Originally Posted by
pr00ne
Martin the Martian,
I doubt that there was any such restriction seeing as the majority of the RAF's Hunters, Shackletons and Javelins were also MDAP funded.
From documents I've seen, the US did place restrictions on the use of aircraft they bought (or part-funded) via their various aid programmes. The restrictions were not just by numbers (i.e. "we've paid for N so we'd better see N assigned to SACEUR") but, in some cases at least, also applied to individual aircraft, identified by serial. The latter restriction came as something of a surprise to the Air Ministry and caused a fair amount of inconvenience when it became known, since it meant they had to ensure only non-US funded aircraft went out of area.