North Coates buried treasure
Perhaps your friend may remember where this was all buried on the airfield, was it buried by mechanical means or spade? Currently all the airfield south of the concrete runway and the Rocket site has returned to agriculture and anything over 3 feet deep will probably still be there although, when 10 years ago a company who specialise in removing underground objects did do a complete search of the airfield and removed anything that could be removed which was mostly electric cable, although they did say they had discovered a deep mass of metal in the south eastern corner but this was believe to be either aircraft wreckage or the fabled Bomb Disposal School collection which was was supposedly buried there when they left in the 1950s.
If your friend can remember where it was buried we might be able to solve this mystery