Spitfire question: 616 Sqn May 1942

Hi,

I am trying to confirm individual letter for the Spitfire VI flown by Pilot Officer C.B. Brown of 616 Sqn during the interception of a Do217 on 25th May 1942. This was the first encounter with the Luftwaffe with a Spitfire VI. The brief encounter led to the Dornier being damaged but Pilot Officer Brown losing his eye when his canopy was shattered by return fire. Johnnie Johnson was involved in the combat but didn’t engage the Dornier himself.

The Squadron ORB is no help as no serials or aircraft letters are listed. This information is also absent from the combat report. Graham Pitchfork’s book on 616 Sqn has the Spitfire serial as BP250 but a brief search through some of my reference material suggests that this serial was never assigned to a Spitfire so must be an error. I believe that this is a typo as BR250 fits the bill perfectly.

It will be YQ-?, but what letter did BR250 carry?

Cheers,

Mike