Here is a partial list of Canadian pilots who fought in the Battle of Britain (RAF):
Stan Turner (242 Squadron); Dal Russel; Gordie McGregor; and Ernie McNab. You should be able to track down which RAF squadron they flew for. I believe that Art Jewett, who later flew with 441 RCAF, also flew in the BofB. I think that he is still alive and twinkly-eyed in Fredericton New Brunswick. I used to see him occasionally at the grocery store.
By 1943, 21 RCAF squadrons had been formed (Day Fighters, Night Fighters, Reconnaissance, and Fighter-Bombers). I have a list if you need it.
Check out David L. Bashow's "All the Fine Young Eagles" for more names and Squadron memberships. It's a pretty good resource, and has some good anecdotes (as when Art Jewett flew a repaired Spit through contested air space in France with no ammo ... he dumped the ammo and instead he had live lobsters put into the ammo pans so his mates could partee!). Someone else flew in a spit with 2 kegs of British ale, one attached under each wing. Those guys had their priorities straight!