It might have been an apocryphal tale, but I heard that when Winston and Clementines' engine life was looking worrying, in some hangar in the depths of an MU some crates were discovered....
On which the word 'Derwent' was noted. Full paperwork was included, so the provenance was assured! Hence rather than being consigned to a future in MRDs (Machine Runway Deicer - a double Derwent and garden shed device), the engines made their way to the RAF's last airworthy Meteors!