333 Sqn was not formed until May 1943
Before that you want to look for 1477 Flight and before Feb 1943 something called the Norwegian Detachment
On the 10th August 1942 210 Sqn Catalina flew two passengers on a special flight to Archangel AH559 N
They returned on the 12th August
https://discovery.nationalarchives.g...ils/r/D8393492
Regards
Martin