The captain of a Thomas Cook aircraft flying from Ibiza to Manchester encountered a “near miss” with a “rugby ball”-shaped UFO, which passed within feet of his Airbus.


The incident, over Reading last summer, was reported to the aviation authorities, who launched an investigation. But no earthly identity for the object could be established.


The encounter was disclosed earlier this month by the Telegraph, following the publication of a report into the inquiry. The document did not identify the aircraft involved.


However, following an analysis of flight data recorded on the internet, the newspaper established it was a Thomas Cook Airbus A320 which was flying to Manchester from Ibiza, on the evening of July 19, 2013.


The aircraft was flying at 516mph, at an altitude of 34,000ft, when it was passed by the apparent UFO.


It only emerged following publication of the report, which concluded it was “not possible to trace the object or determine the likely cause of the sighting”.


The captain said he spotted the object travelling towards the jet out of a left-hand side cockpit window, apparently heading directly for it. He said there was no time for the aircrew to take evasive action.


He told investigators he was certain the object was going to crash into his aircraft and ducked as it headed towards him.


The incident was investigated by the UK Airprox Board, which studies near misses involving aircraft in British airspace.


The report states: “(The captain) was under the apprehension that they were on collision course with no time to react. His immediate reaction was to duck to the right and reach over to alert the FO (First Officer); there was no time to talk to alert him.”


It adds: “The captain was fully expecting to experience some kind of impact with a conflicting aircraft.”


He told investigators he believes the object passed “within a few feet” above the jet.


He described it as being “cigar/rugby ball like” in shape, bright silver and apparently “metallic” in construction.


Once it had passed, the captain checked the aircraft’s instruments and contacted air traffic controllers to report the incident. However, there was no sign of the mystery craft.


As part of the inquiry, data recordings were checked to establish what other aircraft were in the area at the time. However, all were eliminated. The investigation also ruled out meteorological balloons, after checking none were released in the vicinity.


Toy balloons were also discounted, as they are not large enough to reach such heights. Military radar operators were contacted but were unable to trace the reported object.


A spokesman for Thomas Cook Airlines told the Telegraph: “All our pilots are trained and required to report any unexpected events that occur during the flight to the aviation authorities.”