Investigators say there was a "serious risk of collision" but "providence" played a part in events.

A Spitfire and Cessna 340 came close to crashing at 1,900ft, a report finds.

The white object appeared "suddenly" and "narrowly avoided hitting the aircraft", report says.

The UK Airprox Board says there was a "serious risk of collision between the two aircraft".

Four F-15s came as close as 50ft (15m) to a glider flying over Norfolk, a report finds.

One of the F-35 jets passed over the helicopter at a distance of 600ft, a report says.