Go to:
..\Steam\SteamApps\common\il-2 sturmovik cliffs of dover\parts\bob\speech\gb\Actor2
then click on the Blenheims.ogg file.
Will be difficult to focus on flying the mission if there are many more like that about.
Could be a great idea to expand this feature to include voices from the entire cast - Charles Hawtrey as a rookie pilot, called, probably, Pilot Officer Tinkle (P. Off Tinkle) or such like, Sid James would make a great Chief Erk.
Carry On Over Dover...
