David has used many different accents in his roles. Kelly from our board listed some of them here.

3 categories:
1 - completely standalone different accents from his own.
2 - accents I couldn't really place anywhere in the UK so I've classed them as variations on his own accent, where he has either made it softer or harsher.
3 - Own accent and dialect.

1. Different Accents
Divorcing Jack - Irish
Naked - Mancunian
Seven Years In Tibet - Austrian
Gangster No 1 - Cockney
Black Beauty - Cockney
Life Is Sweet - Cockney
Dandelion Dead - Somerset

2. Variations on his own
Dragonheart
Dr Moreau
American Perfekt
Prime Suspect 3
Dinotopia
Besieged
Total Eclipse
Restoration
Prisoner Of Azkaban

3. Own accent and dialect
Resurrected
Vroom