Royal Navy Corsairs had a couple of differences to US ones. Apart from a few F4U-1s used for training only, all RN Corsairs had squared-off tips to get them into the lower RN carrier hangars. Also most had the F4U-1A-style framed cockpit, even the F4U-1D equivalents. So the usual reference of the framed cockpit is not a reliable way to find out what an RN Corsair was built as.
Another confusing thing is that the RN's policy on marks of Corsair refer to the factory the aircraft was made in. So the Mark I and II were made by Vought with the Mk II having the clipped wing. The Mk III was made (badly) by Brewster and just used for training. The Mk IV was made by Goodyear. Most of these four marks had a mix of F4U-1, 1A and 1D variants.
I have a list of RN serial numbers set against factory data and in the case of JT 410 and 422 they were both Vought-built Mk IIs and F4U-1A equivalents.