The final details have been announced for the two Chris Evans cars/music/food extravaganzas to take place in Hampshire and Cheshire, in aid of BBC Children in Need.

Carfest South will take place at at Laverstoke Park Farm (25-26 August) and Carfest North will happen at Cholmondeley Castle in Cheshire (8-9 September). Laverstoke Park Farm is the home of 1979 F1 champion and organic farmer Jody Scheckter, while Cholmondley is the venue for the annual Pageant of Power, the North's equivalent of the Goodwood Festival of Speed.

"It's getting quite scary," admitted Evans. "I had this crazy CarFest idea back in March and since then everything has gone completely bonkers. We've sold thousands and thousands of tickets, launched a second event in the north, been overwhelmed with offers for super-duper cars, some of my favourite live bands plus fabulous food and now the clocks are ticking down. Boy, from a personal and selfish point of view, this really is going to be good. It's my kind of festival – I'm just hoping everyone else agrees with me, the sun shines and that we raise humongous amounts of money for BBC Children in Need as, after all, that's what all this fantastic fun is really all about."

The cars will include displays of Evans' own models, other supercars, Group B rally cars, F1 cars and classic cars. The target is for seven static galleries, each including seven different marques displaying seven of their finest creations – that adds up to a showcase of 343 of the world's most interesting cars.

Food will include a special Britain's Best Pavilion which will house the very finest food and drink that Britain has to offer as chosen by a panel of food experts.

Music will include the Counterfeit Stones, Ultimate Eagles and Bootleg Beatles to kick off the action with Texas, Razorlight, The Magic Numbers and Merrymouth (featuring members of Ocean Colour Scene) heading the bill at both CarFest festivals. The Feeling join the Laverstoke line-up while Paloma Faith and The Proclaimers are on the Cholmondeley bill.