A Tornado jet came within 400ft of a light aircraft as it approached RAF Marham.

A report by the UK Airprox Board, which investigates near-misses between aircraft, says the Tornado was preparing to land when its crew were informed that a Cessna was flying at 1,500ft 10 miles west of them engaged in aerial photography.

As they worked out the aircraft's position, the crew then received an automatic warning and climbed to 2,000ft.

'The crew observed the conflict go directly beneath them, but never became visual with the contact,' the report says. The light aircrtaft passed 400ft below them.

The crew, who assessed the reisk of collision as 'medium' landed safely. The light aircraft pilot said the Tornado would have been aware of his posiiton and assessed the risk as 'none'.

The report concluded the Tornado crew's climb had ensured that there had been no risk of collision.