No he's not:
a) because he's Scottish
b) because he's related to Dario Franchitti
(He was very unlucky last year not to win the DTM - I reckon he would've won it had it not been for the blatant team orders that are possible when there are only 2 manufacturers).
Im pretty sure Scotland is still classed as Britain these days...
Indeed the DTM is rife with team orders. Its a shame really as they are essentially dressed down sports cars which could provide ace racing