The British Airways 777 and the Silver Object Over Guildford, 24 June 2026
A British Airways Boeing 777 bound for New York passed within a reported fifty feet of a shiny silver object over Surrey, and the UK Airprox Board graded it a definite risk of collision while refusing to say what the object was.
What did witnesses see at 4NM northeast of Guildford?
At 1208 UTC on 24 June 2026 a British Airways Boeing 777 was climbing out of London Heathrow toward New York. Passing 5,800ft about four nautical miles northeast of Guildford, in Class A airspace of the London Terminal Control Area, the crew saw a shiny silver object pass close down the right-hand side of the aircraft.
The pilot's own filed words are short and are worth quoting exactly, because almost every later account paraphrases them. The Board's record reads: "The B777 pilot reports that they were climbing to altitude 6000ft on departure from LHR. Passing 5800ft, a shiny silver object (likely a mid-size drone) passed in the opposite direction, very fast and very close to the right wing of the aircraft at no more than 50ft above aircraft altitude. It was too close for comfort."
The fuller description came over the radio rather than on the form. The London Terminal Control Centre controller's account records that the crew reported a drone had just flown over their right wing, that it was moving very fast, and that it was "probably of silver colour, metallic and reflective". The often-quoted size estimate was an answer to a direct question: after the controller asked how big it was, the crew said it was about the "size of four toasters".
The reported separation is recorded as 50ft vertical with no horizontal figure given, and the crew entered no estimate of collision risk at all. NATS Safety Investigations reviewed the radar for the time of the sighting and found no radar contacts associated with the object.
What is the official explanation?
The official narrative here is not a denial and not an identification. It is a formal refusal to identify, issued by the body whose whole function is to adjudicate these encounters, and it is the reason this case is in the archive.
The UK Airprox Board assessed the report at its meeting of 16 September 2026 as Airprox 2026127. The Board has a standard finding it reaches when a reported object is probably a drone, and it used that finding on eight of the thirteen drone and unknown-object reports in the same batch: that the reported altitude and description "were sufficient to indicate that it could have been a drone". It did not use it here. The finding recorded against 2026127 is the other one: "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." The object column of the Board's own sheet reads "Unk Obj", not "Drone".
The Board then graded the encounter Category A, its most serious: "The Board considered that providence had played a major part in the incident and/or a definite risk of collision had existed." Of the thirteen reports assessed that day this is the only Category A. The applicable contributory factors are recorded as 4 and 6. Factor 6 in the Board's scheme is a near collision with an unpiloted airborne object, which covers an unknown object or a balloon, and is the separate code from factor 7, which is specific to drones.
So three separate fields of the same official record agree with each other: the object was logged as unknown, the drone finding was withheld, and the contributory factor assigned was the unpiloted-object code rather than the drone code. That internal consistency is what makes this more than a wording accident.
British Airways addressed the sighting publicly. A spokesperson told The Independent: "We take matters such as these extremely seriously, and our pilots report these incidents so authorities can investigate them and take appropriate action." The airline said the crew did not need to take any action to avoid the object, and the flight reached New York as planned.
What did the witnesses think it was?
The crew's own framing deserves care, because it cuts against the headlines in one direction and supports them in another.
They did not report an anomalous craft. The filed report says "likely a mid-size drone", which is the crew offering the prosaic explanation themselves, unprompted, in the document. Any account that presents this as airline pilots reporting a UFO in the popular sense is reading something into the file that the pilots did not write.
What the crew did report, and what survived the Board's review, is a set of observations that the Board found it could not reconcile with a drone. The object was travelling in the opposite direction and very fast, at a closing speed that a departing 777 passing 5,800ft would make considerable. It was silver, metallic and reflective. It passed no more than fifty feet above the aircraft's altitude, down the right-hand side. And it left no radar return.
The phrase that carried the story around the world, the "size of four toasters", is worth putting back in context. It was not a flourish in a written report. It was a working pilot's answer to a controller asking, in the moment, how big the thing was, reaching for a household object to convey a scale he had no better unit for. Four toasters end to end is on the order of a metre, which is the size class of a large consumer or light commercial multirotor.
One detail in the crew's account has no comfortable reading either way. "It was too close for comfort" is the pilot's own closing line on the form, and the Board's Category A grading is the institutional version of the same sentence.
Is the British Airways 777 and the Silver Object Over Guildford, 24 June 2026 real? The two-pass assessment
Pass one, how could this be mundane. The leading candidate is a drone, and it is a strong one. The crew said so themselves. Drone sightings around Heathrow departures were not rare that month: the Board's record for Airprox 2026123, three days earlier, notes that there had been "many drone sightings in the area", that the information had been put into the ATIS, and that there were three other reported drone sightings within thirty minutes of that one report. A metre-class multirotor at 5,800ft is illegal and dangerous but entirely physically possible, and the absence of a radar return argues nothing against it, because small drones routinely produce no primary or secondary contact. Every other unknown-object report in this same batch shares that feature.
The second candidate, and the one the Board's own batch raises explicitly, is a metallised balloon. Silver, metallic and reflective describes a foil party balloon as well as it describes a drone, and two other crews in the same September batch said so unprompted. The pilot of a Cessna 172 near the Lee Valley reservoirs on 26 June first took his object for "a metallic helium balloon" before getting close enough to see rotors and lights, at which point the Board gave him the drone finding. The crew of a Boeing 787 near Rochdale on 28 June recorded that they "cannot be certain that the object wasn't a metallicized balloon", and the Board filed that one as unknown, the same verdict it gave this sighting. A free balloon also fits the one observation a hovering drone fits least well, which is a fast passage in the opposite direction, because a 777 climbing through 5,800ft supplies all the relative speed required against an object that is barely moving.
The third possibility is that the crew misjudged the range of something ordinary and more distant. At a glance, against a bright sky, an object seen for a moment beside a wing is extremely hard to place in depth, and the reported fifty feet is an estimate made under those conditions. The weather does not rescue the crew here or convict them: Heathrow reported no cloud detected and the maximum reportable visibility through the middle of that day, so the sky was clear and bright and the object was seen in full sunlight, which is consistent with something genuinely reflective and equally consistent with a glint on something further away than it looked.
Pass two, if the prosaic answers do not hold. The honest statement of this case is narrower than the headlines and more interesting than a drone report. Nobody has demonstrated what the object was. The body charged with deciding had the pilot's report, the controller's recorded account and the NATS radar analysis in front of it, has a ready-made drone finding it reaches for whenever the description will carry it, used that finding eight times in the same sitting, and declined to use it here. It then rated this encounter as carrying a definite risk of collision, the only one of the thirteen it graded that way.
That combination is the whole content of the case: the Board thought the encounter was dangerous enough to be its most serious grade of the day, and at the same time thought the evidence insufficient to say what the aircraft nearly hit. This archive records it as Unknown, which is the same position the Board took, and notes that an unknown object at 5,800ft on a departure path out of Europe's busiest airport is a live aviation safety question regardless of what any reader believes about the wider subject.
One limitation is stated plainly rather than papered over. There is no photograph, no video and no radar track. Everything above rests on the reports of the flight crew and the controller as recorded in the Board's summary sheet, plus the negative result of the NATS radar review. A later identification of the object remains entirely possible and nothing here forecloses it.
Sources
- www.airproxboard.org.uk/media/3oif3tkt/september-2026-drone-summary-sheet.docx
- www.airproxboard.org.uk/reports-and-analysis/monthly-airprox-reviews/airprox-reports-2026/september/
- www.airproxboard.org.uk/reports-and-analysis/individual-airprox-reports/2026/
- dronexl.co/2026/10/26/british-airways-777-four-toasters-drone-airprox-unknown-object/
- aerospaceglobalnews.com/news/british-airways-ufo-encounter-heathrow/
- www.ibtimes.co.uk/british-airways-boeing-777-avoids-mid-air-crash-mysterious-object-size-four-toasters-1827644
- www.gbnews.com/news/british-airways-jet-mystery-ufo-heathrow-airport
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