Blenheim aircrew line-up ID required
 

Hi all:
The attached was deposited at our local newspaper office last week. While the recent hand-written caption would appear to indicate 21 Sqn Blenheim crews at Watton, I do not believe the picture was taken there. I already have all the details regarding Sgt Ken Hayes who was lost on 28 Aug 1941 in Z7435 during the Rotterdam raid. Does anyone recognise the hotel, or any of the airmen in the picture apart from Hayes? It has been suggested the photo may have been taken at a Blenheim OTU.
TIA for any help on this one.
Regs,
Bob C