2006 British Touring Car Championship

Vauxhall's only opposition for a sixth straight Manufacturers title came from SEAT, who replaced its trio of Toledos with a pair of new Leons.

Scottish driver Gordon Shedden graduated from the SEAT Cupra championship to replace Dan Eaves, while Gareth Howell again appeared in a third car later in the season as he had in 2005.

Tom Ferrier also returned to the series with Motorbase in the final round, driving an ex-works SEAT Toledo.

Synchro Motorsport ran James Kaye in their Honda Civic Type-R for a fourth straight season, while Jason Hughes also returned driving an ex-works MG ZS for his Kartworld Racing team.

Running bio-ethanol fuel for a second year were Tech-Speed Motorsport, who once again ran Fiona Leggate in their Vauxhall Astra Coupe.

Mark Proctor switched from his Astra Coupe for his second season, his Fast-Tec Motorsport team instead running the Honda Civic Type-R driven by Tom Chilton in 2005.