A (up from A-).
Mike Leigh's best? If not, then it's certainly his most interesting an unusual; a hostile, ranting maniac of a film.
Everyone has already praised David Thewlis' performance, which is quite simply one of the greatest, fastest, most energetically violent performances ever put to screen. Instead, I'll point out two excellent components of the film that don't get talked about as much: Dick Pope's smooth cinematography, so stylish in its grime and decay when compared to Mike Leigh's usual still style, and Andrew Dickson's score, both beautiful and unnerving, which has stayed in my head more than anything else in the film.
The only thing holding this back from A+ is Jeremy/Sebastian, who tips over into grotesque caricature almost immediately and never recovers. Otherwise, this is one of the best British films of the 1990's and a truly fearless character study.