Hi, The two Whirlwinds that crashed on Dartmoor were P6975 and P6978. Believed collided at night while flying in bad weather. Both pilots killed.
The Whirlwind sent to America P6994, the airframe was scrapped at Pensacola sometime between 1944/47. The Peregrine engines were removed and installed in a motor boat belonging to to Pensacola's commander, fate unknown