ian16th, I assumed you meant French Navy Corsairs as the Aeronavale was flying them into the 1960s, whereas the RN's had all been pushed over the side into the oggin at the end of WW2.
Those must have been the very last RN Avengers, as they went out of service in 1957.
Or possibly Wildcats? Supposedly out of service by then, but a few survivors were still lurking in the more remote of pusser's hangars for a while. I once heard a tale that one was kept (perhaps at RNAS Anthorn?) until its aerodrome closed (1958?), on the personal direction of the Captain - sound fellow!