Thanks all, that gives me something to go on at least. I have a couple of snaps of EB coded Spits at Catterick knocking about somewhere, so I'll crack on from there.
Boring historical bit for you - N3114 was the first Spitfire to be ditched, after combat with a He 111 off Redcar. F/Lt E N (Norman) Ryder was the pilot, and his experience gave the RAF some 'guidelines' on how to ditch a Spitfire if the occasion arose. Ryder got the DFC for this, and considering he went out after that He 111 with 300ft cloud base, and less than a mile vis, and it was raining, says a lot for the character of the pilot.
Kind Regards
Andy