F/Lt Frank Brinsden was a Spitfire pilot with No. 19 Sqn until late into the Battle of Britain, and then was the RAF flight commander in No. 303 (Polish) Sqn.
Frank's son, Paul provided a photo taken on 21 February 1941 at Frank's wedding, that shows five officers. Two of them were Polish, from No. 303: F/O Wojciech Kolaczkowski and F/Lt Jerzy Jankiewicz. But both the Brinsden family and myself are unable to identify who are the other three. I have posted a scan on another forum:
I can also send a scan if you PM me.