Three main possibilities:

• Engine failure after takeoff - turning back to the airport is known as the "impossible turn". It isn't quite impossible but it is difficult to execute successfully once you add on the startle factor. An incorrectly executed "impossible turn" usually results in a low altitude stall, which is normally fatal, so generally light aircraft pilots are trained to find somewhere to put it down directly in front of the aircraft.

• Engine failure on approach to land - aircraft following the standard '3 degree glideslope', this is too shallow of a glideslope for most aircraft to actually glide at without power so in the case of an engine failure the aircraft will end up short of the airfield.

• Engine failure during cruise flight - aircraft diverted to EGBJ/Gloucestershire but didn't have enough altitude to quite make it there. But this also gives the most time to look for a suitable paddock to put it down in.