Ah yes, a standard Air Ministry issue fire bell which are, thanks to that clip, always sold as scramble bells for silly amounts of money. They were still in use at the fire points on RAF Stafford well into the early 2000s.

I don’t know where the bell ringing was filmed but scene that follows shows 602 Sdn members running to their Spitfires at Prestwick during the filming of ‘A Yank in the RAF’ in late 1940.

Anne