AN unknown object was spotted at 4,000 feet by a pilot landing a plane at Leeds Bradford Airport (LBA).

The incident involved a Boeing 737 and occurred at 12.51pm on August 28 earlier this year.

The pilot was turning left when they observed a dark, solid-looking object, which was assumed to be a drone.

The object passed from left to right and was estimated to be around 50m away at first sighting and around the same level.

The risk of impact was stated as low because the plane was turning away from the object.

No further action was taken and a safe landing was made.

An LBA controller said: "The pilot reported a man-made object passing down their right-hand side when the aircraft was established on base-leg at altitude 4000ft in the descent.

"There were no primary returns on the radar screen."

As part of October's summary report, the UK Airprox Board risk report said: "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 Board considered that the pilot’s overall account of the incident portrayed a situation where although safety had been reduced, there had been no risk of collision."