[ATTACH=CONFIG]244858[/ATTACH]Having finally obtaining an enhanced version of one of the series of Lancaster ‘formation’ photos taken on 6th May 1965, I have definitely managed to confirm the serial of the RAF Victor (57 Sqn) as indeed being ‘XH591‘ (and not ‘XH621’ as has been muted in a number of articles elsewhere on the web. Thanks to all those who responded to this request.