The Avon Tyres British GT Championship season bursts back into action this weekend with a pair of hour long races at Snetterton, and following the summer break there is much change in the paddock.

Following a destructive accident at Brands Hatch at the previous round the JMH Nissan GT-R is absent from the entry list Benji Hetherington moving to Motorbase Performance's Porsche squad to join Steve Parish, Hetherington returning to the driving seat of a Porsche after having competed in the Porsche Carrera Cup GB last season after receiving the Porsche Scholarship award.

Continuing the cycle of musical chairs in the paddock Phil Burton's Predator CCTV Ferrari 430 Scuderia will be run by the JMH squad, Burton and co-driver Adam Wilcox hoping to break a run of problematic races in the black #12 car.

Making a return to the championship, Marco Attard shares the Rhino’s Leipert Motorsport Lamborghini with Hari Prozcyk. Attard shared the car with team principal Marcel Leipert at the Nurburgring rounds in May, finishing an impressive seventh in the first race at the German track.

Alongside the Lamborghini the debut of three more cars adds further depth to the British GT field. Almost undoubtedly the most eye-catching of the new additions is United Autosports' McLaren MP4-12C. The Anglo-American team announced their switch in focus to the British championship from the Blancpain Endurance Series before last weekend's Spa 24 Hours, and Matt Bell and Charles Bateman will swap their Audi R8 LMS ultra for McLaren machinery for the first time this weekend ahead of the team making a full assault on the British GT crown in 2013.

In the GTC class – as well as the return of the Chevron GR8 after missing the Brands round – FF Corse field Gary Eastwood and Ryan Hooker in a Ferrari 458 Challenge, while the GT4 field is bolstered by the arrival of Complete Racing's Aston Martin, former VW Racing Cup man Steve Chaplin joined by Phil Keen in surely a threat to the established GT4 runners which all return, save for the Lotus Sport UK Evoras, the team sadly missing their home round.

The Evoras will not be the only absentees this weekend. Both Team WFR and Optimum Motorsport's Ginetta G55s will both be missing, the former a victim of delays in supply from Ginetta's Yorkshire factory.

Furthermore, following a crash while instructing at Spa-Francorchamps, Oliver Bryant will sit out the weekend for Ecurie Ecosse. Instead Oliver Millroy, who drives for the Barwell Motorsport run squad in the Blancpain Endurance Series, stepping in to drive the car with Alasdair McCaig.