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Assessment Summary Sheet

Contributory factor assessment for each assessed Airprox can be downloaded 

Number of Airprox reports assessed, and their ICAO Risk rating
Total Risk A Risk B Risk C Risk D Risk E
20 1 8 5 1 5
Assessed Airprox reports

Airprox

Aircraft 1 (Type)

Aircraft 2 (Type)

Airspace (Class)

ICAO

Risk

2025064

Nynja (Civ FW)

R22 (Civ Helo)

Shobdon ATZ (G)

B

2025067

Hawk (HQ Air Trg)

G109 (Civ Gld)

London FIR (G)

E

2025069

CH47(A) (HQ JAC)

CH47(B) (HQ JAC)

Odiham ATZ (G)

C

2025071

PA28 (Civ FW)

DA42 (Civ FW)

London FIR (G)

C

2025073

EC145 (HEMS)

PA32 (Civ FW)

Leeming CMATZ (G)

E

2025074

ASH25 (Civ Gld)

Arcus (Civ Gld)

London FIR (G)

A

2025075

Discus (Civ Gld)

DA42 (Civ FW)

London FIR (G)

B

2025076

KC46 (Foreign Mil)

F35 (Foreign Mil)

London FIR (G)

E

2025077

C130 (Foreign Mil)

ASK21 (Civ Gld)

London FIR (G)

C

2025078

Hawk (HQ Air Trg)

PA28 (Civ FW)

London FIR (G)

B

2025079

Pipistrel Alpha (Civ FW)

PA28 (Civ FW)

London FIR (G)

B

2025080

PA28 (Civ FW)

Eurofox (Civ FW)

Compton Abbas ATZ (G)

B

2025081

Long-EZ (Civ FW)

BE200 (Civ Comm)

Scottish FIR (G)

E

2025082

Discus (Civ Gld)

Paraglider (Civ Hang)

London FIR (G)

B

2025083

Duo Discus (Civ Gld)

AW139 (Civ Comm)

London FIR (G)

C

2025085

C152 (Civ FW)

EA300 (Civ FW)

Barton ATZ (G)

C

2025086

ASW27 (Civ Gld)

BE200 (Civ Comm)

London FIR (G)

B

2025087

Vega (Civ Gld)

PA32 (Civ FW)

London FIR (G)

E

2025089

EC145 (HEMS)

PA28 (Civ FW)

London FIR (G)

B

2025091

Wildcat (HQ JAC)

Unknown

London FIR (G)

D

 

Consolidated Drone/Balloon/Model/Unknown Object Summary Sheet

Contributory factor assessment for each Drone/Balloon/Model/Unknown Object Airprox can be downloaded 

Number of Drone/Balloon/Model/Unknown Object reports, and their ICAO Risk rating
Total Risk A Risk B Risk C Risk D Risk E
16 0 7 7 1

1

Airprox

Number

Date

Time (UTC)

Aircraft

(Operator)

Object

Location[1]

Description

Altitude

Airspace

(Class)

Pilot/Controller Report

Reported Separation

Reported Risk

Comments/Risk Statement

ICAO

Risk

2025112

13 Jun 25

0729

B777

(CAT)

Unk Obj

5110N 00006W

3NM E Gatwick

900ft

Gatwick CTR

(D)

The B777 pilot reports that a drone was noticed at aircraft altitude, off the right wing and probably no more than 300-500m away. They were at approximately 900ft on final approach to RW26L at Gatwick. The drone was reported to ATC after a safe landing.

 

Reported Separation: 0ft V/300m H

Reported Risk of Collision: NR

 

The Gatwick GMC controller reports that [the pilot of the B777] informed them on the GMC frequency that they had encountered a drone on the final approach to RW26L at approximately 2-3NM final. The crew estimated that the drone was at 900ft and had passed down the right-hand-side of the aircraft, approximately 300m from the starboard wingtip. No other reports of the drone were reported.

In the Board’s opinion the reported altitude and/or description of the object were such that they were unable to determine the nature of the unknown object.

 

Applicable Contributory Factors: 4, 5

 

Risk: The Board considered that although safety had been reduced, there had been no risk of collision.

C

2025120

24 Jun 25

1748

DHC8

(CAT)

Drone

5131N 00001W

Bow

2600ft

London TMA

(A)

The DHC8 pilot reports a black drone was spotted in the initial climbout. At approximately 2600ft they saw a drone on the right-hand side.

 

Reported Separation: 15ft V/100m H

Reported Risk of Collision: High

 

The London City Airport investigation determined that [the pilot of the DHC8] departed RW27 and, shortly afterwards, reported a drone on their right- hand-side as the aircraft was in a right turn on a SOQQA1A departure approximately 2.5-3NM north-west of the aerodrome at 2700ft. There were no other reports of the drone from the pilots of following departing aircraft.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 4, 5

 

Risk: The Board considered that although safety had been reduced, there had been no risk of collision.

C

2025121

14 Jun 25

1637

A350

(CAT)

Drone

5133N 00041W

5NM NE White Waltham

5500ft

London TMA

(A)

The A350 pilot reports that a normal departure was flown from RW27L. South of position UMLAT, an object was spotted ahead approximately in the 12 o’clock position. It was observed to move to the right of the aircraft nose, pass below the aircraft and to the right side. It was estimated to have been at around 5000ft altitude, 500ft below the aircraft as it passed the right wing. It was observed to be a metallic red and black colour. The information was passed to ATC on departure. An update to Heathrow ATIS suggested that other pilots had also seen it.

 

Reported Separation: 500ft V/NR H

Reported Risk of Collision: NR

 

The Swanwick LTCC controller reports that, at 1640, [the pilot of the A350] reported a drone sighting at approximately 6000ft, north of BUR. The drone was metallic red. The sighting was reported to Heathrow Police.

 

[The pilots of three subsequent UMLAT departures] were informed of the sighting and position. [The pilot of one of those aircraft] reported that the cloud-top was roughly 6000ft. None of the pilots of those subsequent departures report a sighting.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 4, 5

 

Risk: The Board considered that although safety had been reduced, there had been no risk of collision.

C

2025123

24 Jun 25

1551

B737

(CAT)

Drone

5325N 00206W

Stockport

2600ft

Manchester CTR

(D)

The B737 pilot reports that the aircraft was established on ILS 23R MAN. When passing approximately 7.5NM at around 2600ft, the Captain noticed a shape above the aircraft, level at the 1 o’clock position relative to the aircraft. They mentioned it to the FO who also observed and suspected the object was a drone. The object passed about 300ft above the aircraft and to the right by about 100ft. The drone looked like a white or grey quadcopter with an oval above.

 

Reported Separation: 300ft V/NR H

Reported Risk of Collision: NR

 

The Manchester controller reports that the B737 was established for an ILS approach for RW 23R. When passing 7.5NM from touchdown, the pilot reported passing in close proximity to an unknown object that may have been a drone. Upon receipt of this information, all following arrivals were warned by AIR or Manchester Approach. No further sightings were reported.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 4, 5

 

Risk: The Board considered that although safety had been reduced, there had been no risk of collision.

C

2025128

30 Jun 25

1408

A321

(CAT)

Drone

5110N 00000W

7.5NM E Gatwick

2300ft

London CTR

(D)

The A321 pilot reports that on 7.5 mile final at Gatwick a drone was spotted by the First Officer. The Captain did not see it as a position check was being conducted. It was at the same level and south of the centreline. The FO believed it was very close.

 

Reported Separation: 0ft V/NR H

Reported Risk of Collision: High

 

The NATS Safety Investigation states that the pilot reported observing the drone approximately 7 miles from touchdown, the aircraft was displayed on radar replay to be descending through 2300ft at this point. After landing, the A321 pilot reported to the Gatwick Tower Ground Movement Controller they had observed a ‘possible drone sighting abeam their position, south of the centreline but close to the approach at approximately 7NM’, the crew described the drone as ‘small and black’. The pilot was transferred to the Tower AIR controller frequency at 1407:20 prior to the reported drone sighting. There was no further sighting reported on the Gatwick Final Director frequency. Safety Investigations was informed by the UK Airprox Board (UKAB) on 3rd July 2025 that the A321 pilot had reported the sighting as an Airprox. Analysis of the radar by Safety Investigations indicated that there were no associated primary or secondary contacts associated with the drone report, visible on radar at the approximate time of the event.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

 

Applicable Contributory Factors: 1, 2, 3, 4, 7

 

Risk: The Board considered that safety had been much reduced below the norm to the extent that safety had not been assured.

B

2025133

2 Jul 25

0850

A320

(CAT)

Drone

5440N 00604W

5NM east

Belfast Aldergrove

2000-2500ft

Belfast CTR

(D)

The A320 pilot reports on final approach into RW25 at around 5NM, just after gear down and about to fully configure, when the Captain noticed a floating object to the left, within 100ft of aircraft, pass by the left wing. They initially suspected a drone, mentioned it to the FO, and continued to land uneventfully. On landing, passengers on the left side of the aircraft informed them they had seen a drone. ATC was informed after landing.

 

Reported Separation: 0ft V/<100ft H

Reported Risk of Collision: NR

 

The Belfast controller reports the A320 pilot reported a drone sighting on the approach approx 15min after landing, Position was between 5NM and 7NM east of the airfield at 2000-2500ft. The drone was reported as yellow. Co-ordination was effected with police, airport authorities and local management. All movements were suspended.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 4, 7

 

Risk: The Board considered that safety had been much reduced below the norm to the extent that safety had not been assured.

B

2025134

19 Jun 25

1233

Tutor

(HQ Air Trg)

Drone

5247N 00023W

N of Bourne

5000ft

London FIR

(G)

The Tutor pilot reports they were the captain and non-handling pilot in the left-hand seat conducting an instrument rating test on a trainee pilot. The trainee was wearing a visor, and they asked them to conduct a 45° turn to the right. As they looked out to the right to clear the area, they saw an Unmanned Air System (UAS) at the same level (5000ft AMSL) and approximately 500m away. They took control of the aircraft and maintained straight and level flight. The UAS passed down the right-hand side of the aircraft at approximately 100-200m and it appeared to be a black quadcopter approximately 10kg in weight. The UAS appeared to be doing orbits at 5000ft AMSL in the vicinity of Bourne. They departed the area to the west and informed the Wittering Zone controller, who relayed the information to all other airborne aircraft in the local area. The sortie was completed without further incident and ATC had already informed Tutor Ops at Wittering on their return. Further detail was passed to the Duty Authoriser during the in-brief and the remaining Tutor crews were warned about the UAS during their out-brief.

Their assessment of collision was low, but only because it was identified early, and then appropriate avoiding action could be taken. If the UAS was not identified before the aircraft commenced the 45° angle-of-bank turn, their assessment of the collision risk would have been medium, as there were very limited barriers remaining.

 

Reported Separation: 0ft V/100-200m H

Reported Risk of Collision: Low

 

The Wittering Radar unit reported that on review of the radar recording, there were no radar returns displayed that could be associated with the reported UAS. Additionally, Wittering ATC had received no information regarding UAS activity in the area. Following the pilot report, notification of the UAS was shared both with the Sqn and aircraft already airborne in the local area.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 4, 5

 

Risk: The Board considered that although safety had been reduced, there had been no risk of collision.

C

2025136

03 Jul 25

0704

A321

(CAT)

Unk Obj

5129N 00022W

LHR RW27R

2.5NM final

855ft

London CTR

(D)

The A321 pilot reports that they were on an ILS Approach approximately 2.5NM final LHR RW27R, when the F/O spotted a drone on the right-hand side (less than half mile) of the flight path, approximately 200ft below the aircraft. The sighting was reported and the flight continued. Drone characteristics - appeared large.

 

Reported Separation: 200ft V/<0.5NM H

Reported Risk of Collision: NR

 

The Heathrow controller reports that [A321 C/S] reported seeing a drone at 2.5NM final on the right-hand side of the aircraft. They advised the VCR supervisor and subsequent landing aircraft. No further reports were received and numerous aircraft reported not seeing any drone in the area.

HAL was contacted and confirmed the drone detection unit was not activated.

 

METAR EGLL 030650Z AUTO 31003KT 250V020 9999 NCD 16/07 Q1028

In the Board’s opinion the reported altitude and/or description of the object were such that they were unable to determine the nature of the unknown object.

 

Applicable Contributory Factors: 4, 5

 

Risk: The Board considered that although safety had been reduced, there had been no risk of collision.

C

2025138

9 Jul 25

1248

B737

(CAT)

Drone

5351N 00139W

Leeds Bradford Airport

150ft

Leeds/Bradford CTR

(D)

The B737 pilot reports that on final approach to Leeds Bradford RW32, when at approximately 150ft, they noticed a drone flying in the airfield area off to the left of the aircraft in the 10 o’clock position, by the golf course. They were at approximately 150ft on final approach and would say that the drone was around 10-20ft above the ground, inside the airfield perimeter, close to the boundary with the golf course. Nothing was seen ahead so, with being so close to the runway, they decided to land. Landing was uneventful, no evasive manoeuvre was needed. They informed the tower on landing, after runway vacated, and passed on all the details. The drone was dark blue/black, cross shaped with 4 props (one at the end of each arm).

 

Reported Separation: 50-100ft V/ 100m H

Reported Risk of Collision: Medium

 

The LBA controller reports that at 1250 the B737 pilot reported seeing a drone on landing. The drone was reported as blue/black in colour and four bladed. The sighting was believed to be around the Juliet area and the fence line next to Horsforth golf course. This put the sighting within the airfield boundary, so Drone Incursion RED was declared and activated. Vehicles were dispatched onto the runway to check for drone activity. At 1320, after over 20min of no sightings, the airfield was re-opened and the incident closed.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 3, 4, 7

 

Risk: The Board considered that safety had been much reduced below the norm to the extent that safety had not been assured.

B

2025144

29 Jun 25

1907

 

B787

(CAT)

Drone

5129N 00008W

12NM E LHR

3500ft

London TMA

(A)

The B787 pilot reports that, at approximately 10NM on finals for RW27R at LHR, a black-and-red drone passed the left-hand-side of the aircraft within 50m. The altitude was 3500ft and the size of the drone was approximately 30-50cm.  

 

Reported Separation: 0ft V/ 50m H

Reported Risk of Collision: Medium

 

The Group Supervisor Airports reports that [the pilot of the B787] reported a sighting of a drone to the Heathrow FIN controller. [The pilot of the B787] reported the drone as being red, approximately 50cm in diameter and at 3000ft, on a 12NM final for RW27R. The Heathrow FIN controller continued to advise subsequent arrivals as to the nature of the report. The Tower Supervisor was notified as well as the police.

 

NATS Safety Investigations report that no primary or secondary contacts associated with the drone report were visible on the radar replay at the approximate time of the event.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 4, 7

 

Risk: The Board considered that safety had been much reduced below the norm to the extent that safety had not been assured.

B

2025146

12 Jul 25

1552

Mavic 3T

(Emerg Servs)

Drone

5148N 00024W

Redbourne

NK

London FIR

(G)

The Police drone operator reports operating in unrestricted airspace, within visual line of sight. Two trained [drone] pilots operating (one operating one observing airspace for safety). A private drone flew within the airspace of the police drone with an estimated closest point of 30m. The Police pilot dropped in height and moved location, giving the airspace to the other drone. The other drone left at speed away from the area. The flight was resumed with caution.

 

Reported Separation: ‘<30m’

Reported Risk of Collision: NR

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 4, 5

 

Risk: The Board considered that normal procedures and/or safety standards had applied.

E

2025148

16 Jul 25

1848

 

A320

(CAT)

Drone

5123N 00004W

Croydon

6000ft

London TMA

(A)

The A320 pilot reports that while being vectored by the Heathrow Director for a base turn to final from the BIG hold, they were descending through approximately 6000ft to 4000ft, reducing speed from 220 to 180kt. They were on the downwind leg, with autopilot engaged. Approximately 10NM northwest of the BIG hold, in the vicinity of Croydon, they observed what initially appeared to be a bird. Within around 5sec, it became clear that it was a drone — likely a large quadcopter, black in colour, approximately 0.5-1m in size. It appeared to be stationary, at an estimated altitude of 6500ft, passing to the left (north of their track) at an approximate vertical separation of up to a max of 500ft above.

 

Reported Separation: 500ft V/0m H

Reported Risk of Collision: NR

 

A NATS Investigation reports that the A320 pilot reported the encounter at 1849:09 stating that the encounter occurred approximately 30sec before. They were descending through altitude 6000ft, 5.2NM northwest of BIG. The pilot provided the following description on the RT: “Two rounded objects, and it was about five miles to the west of Biggin, and seemed to be a black object ... at 6000 feet.” Analysis of the radar by Safety Investigations indicated that there were no associated primary or secondary contacts associated with the drone report visible on radar at the approximate time of the event.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 4, 5

 

Risk: The Board considered that although safety had been reduced, there had been no risk of collision.

C

2025150

18 Jul 25

1732

A319

(CAT)

Unk Obj

5508N 00128W

IVO Blyth

3100ft

Newcastle CTA

(D)

The A319 Pilot reports seeing a drone on their right-hand side whilst descending toward A20 in the vicinity of Blyth.

 

Reported Separation: ~1000-1500ft V/NR H

Reported Risk of Collision: NR

 

The Newcastle Controller reports that the A319 had been turned onto base leg, descending to A20 in the vicinity of Blyth. The pilot reported seeing a drone on their right-hand side, which would have been near Blyth windfarm. The controller turned the aircraft onto the ILS, requesting further information. The pilot advised that they had the contact on TCAS, showing 300ft below. The A319 was indicating A023. The A319 landed safely at 1737. The event was reported to the air traffic assistant, who contacted Northumbria Police.

 

Newcastle Investigation reports that they had discussed [this event] at triage as to whether this was an Airprox or whether this should be reported as such.  In opinion of ATCO there was no traffic visible or showing to consider this an Airprox. 

 

Primary radar recordings were checked but nothing noted.

 

Dedrone report no detections shown however, Blyth is approximately 10 miles away and thus unlikely to show up in this area.  It is outside the FRZ therefore no requirement to request authorisation but if they were above 400ft then they would need CAA approval. 

 

The TCAS report could potentially be the #3750 which was under control of Newcastle but heading North to leave the zone.  At the time of the report, it was 300ft below [A319 C/S].  Whilst they stated it was just in from the coast, the #3750 was approximately 5-7 miles in so it’s unknown if they were referring to this.  It’s more likely this was an aircraft rather than a UAS showing on their TCAS.

 

No further actions required for ATS. The ATCO reacted to the event and reported this to the police to aid in the location of [an] operator.  No operator was located, and nothing was seen on radar to positively confirm that this had been an actual UAS.  No Airprox was reported as no traffic [had been seen] to consider this an Airprox

In the Board’s opinion the reported altitude and/or description of the object were such that they were unable to determine the nature of the unknown object.

 

 

Applicable Contributory Factors: 4, 5

 

Risk: The Board considered that there was insufficient information to make a sound judgement of risk.

D

2025151

16 Jul 25

1419

B787

(CAT)

Drone

5128N 00017W

LHR RW27L

6NM final

1900ft

London CTR

(D)

The B787 pilot reports that the drone was seen out the left-hand side at roughly 6NM at approximately 1900ft on the final approach to RW27L at LHR. The lateral distance was probably 60-100m but hard to judge as it depends on the size of the drone. It was a typical drone design, grey in colour with a rotor in each quarter, like a DJI Mavic.

 

Reported Separation: 0ft V/60-100m H

Reported Risk of Collision: NR

 

The Heathrow Tower controller reports that [B787 C/S] reported that they had seen a drone whilst on final approach. They reported it to the GMC3 ground controller after landing. The drone was to the left of the aircraft approximately 100ft away when they were about 6NM final for RW27L. The Air South controller and GS(A) were told to advise subsequent arrivals. They notified the airport duty manager and the airport police.

A message was placed on the Arrival ATIS for half an hour. There were no subsequent reports of sightings of the drone.

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 4, 7

 

Risk: The Board considered that safety had been much reduced below the norm to the extent that safety had not been assured.

B

2025152

20 Jul 25

0917

A320

(CAT)

Drone

5128N 00034W Datchet

1200ft

London CTR

(D)

The A320 pilot reports that [ATC had relayed] that a Drone had been reported by the preceding aircraft on the approach to LHR, ILS 09L between 4 and 5 miles. They had been VMC by this stage so had elected to continue after a short discussion. They became visual with the drone at [approximately] 4NM. The Drone was white, slightly left of the nose and approximately 100ft below aircraft at time of sighting. The Drone appeared to be level in an orbit and passed down the left-hand side of the aircraft, remaining below throughout.

 

Reported Separation: 100ft V/100ft H

Reported Risk of Collision: High

 

The Heathrow Safety Officer reports that after having informed the A320 pilot that the preceding lander had reported a large white Drone at 3.5NM final approach to Runway 09L, just underneath the aircraft, the A320 pilot confirmed the sighting and subsequently filed an Airprox.

 

HAL reported that the Drone Detection Unit was not activated. No Unit Investigation was deemed necessary. (OCC315219 - INC307425 was originally raised but included the [preceding aircraft – A320 at report 2025161] who was first to report the Drone.

This investigation was raised by Heathrow Safety on the 25th of July 2025).

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

Applicable Contributory Factors: 1, 2, 3, 7

 

Risk: The Board considered that safety had been much reduced below the norm to the extent that safety had not been assured.

B

2025161

20 Jul 25 0917

A320

(CAT)

Drone

5128N 00033W Datchet

1300ft

London CTR

(D)

The A320 pilot reports they passed a drone at 3.3NM, around 1300ft. The drone was around 200ft below, just off their RH wing.

 

Reported Separation: 200ft V/ NR H

Reported Risk of Collision: High

 

 

 

In the Board’s opinion the reported altitude and/or description of the object were sufficient to indicate that it could have been a drone.

 

 

Applicable Contributory Factors: 1, 2, 3, 4, 7

 

Risk: The Board considered that safety had been much reduced below the norm to the extent that safety had not been assured.

B

[1] Latitude and Longitude are usually only estimates that are based on the reported time of occurrence mapped against any available radar data for the aircraft’s position at that time. Because such reported times may be inaccurate, the associated latitudes and longitudes should therefore not be relied upon as precise locations of the event.

 

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