Wikipedia has it wrong as well.
In Wings on My Sleeve there is a picture of him taken after he got his RAF wings which he earned flying with the Edinburgh University Air Unit "under the auspices of 603 Royal Auxiliary Airforce Squadron'. He joined in his first year at University (1937). This was prior to his year in Germany which was part of his languages degree course. 'When I reported back to the RAFVR there was no rush for my services'. On being told the FAA had a desperate need for pilots he took less than five minutes to see the light.
He arrived at Yeovilton the day it opened, he and his colleagues flying off runways that were still under construction.
The 487 was types, many of which he flew multiple marks. A remarkable and truly unique pilot and gentleman - I always thought it criminal that he was never given honorary flag rank, his promotion to rear admiral having been denied by a combination of cuts and political shenanigans.