The other 'oldest' jet in the world still flying - the F-86 North American Sabre. Performing at yesterdays Duxford autumn airshow.
The F-86 was the primary US combat aircraft in the Korean war going head to head with the Mig 15.
Clement Attlee authorized the export of 40 Rolls-Royce Nene jet engines to the Soviet Union in 1946. They promptly copied them, or at least heavily borrowed from, to create a an engine for the Mig 15, as a result the Mig 15 did not smoke, while the fairly inefficient General Electric jet in the Sabre did.