Favorite Battle of All Time

[English assassin]

Depends what you mean by "favourite" I suppose, and battle. We aren't supposed to admit it but the Battle of Britain probably was a defining moment for the British national psyche (indeed many of our European friends claim with some justification that we are unable to forget it).

General Slim's liberation* of Burma in 1944/45 was IMHO one of the best conducted campaigns by any army in any theatre in WW2, so I'd nomnate that as a favourite in terms of the military skill displayed.

(* Oops. I mean reoccupation of Burma for the British Empire, which I suppose is not technically a "liberation" as such)