Of all the a.i. aircraft in the stock game the Blenheim IV is the one I'd like to fly the most because it was so ubiquitous. Basically wherever the RAF flew, regardless of the theater, the Blenheim served at some point during the early and mid war periods... BoF, BoB, Norway, Malaya, Burma, NEI, all over the MTO and also with the Coastal Command and with the Finns of course.
But seeing as Channel maps are being developed I'm inclined to make what must be the eleventy billionth request for a flyable mid 1940 production spec Mk I Spitfire!

I realize the maps won't be available for some time and the BoB era version will be the last one to be implemented but as it stands we have three flyable 1940 LW aircraft but only one British, hence the call for the Mk I Spit... and the Blenheim IV