Confirmed entries according only to press releases on the official btcc.net website.

Martyn Bell Techspeed Racing Honda Integra DC05
http://btcc.net/html/generalnews_detail.php?id=1244

Paul O'Neill Techspeed Racing Honda Integra DC05
http://btcc.net/html/generalnews_detail.php?id=1244

Harry Vaulkhard Tempus Sport Chevrolet Lacetti
http://btcc.net/html/generalnews_detail.php?id=1229

TBA Tempus Sport Chevrolet Lacetti
http://btcc.net/html/generalnews_detail.php?id=1229

Tom Chilton Arena International Ford Focus
http://btcc.net/html/generalnews_detail.php?id=1222

TBA Arena International Ford Focus
http://btcc.net/html/generalnews_detail.php?id=1222

Andy Jordan Team Eurotech Vauxhall Vectra
http://btcc.net/html/generalnews_detail.php?id=1195

So 7 fully confirmed entries so far, with a number of others set to be unveiled at the Autosport show.