Wallace and Gromit have found a new favourite cheese - but Wensleydale still holds a place in their hearts.

Details of the plot for the Curse of the Were-Rabbit have been leaked from the studios of production firm Aardman Animations.

Rumours suggest that in the film Wensleydale is relegated to a bit-of-cheese part, with Gloucestershire cheese Stinking Bishop stealing the show.

Wallace and Gromit declared their love for Wensleydale in 1996. The publicity helped Wensleydale Creamery, in Hawes, North Yorkshire, increase its annual turnover from £4.9m to more than £16m.

The dairy now employs about 200 people and plays a vital role in the dale's economy.

Wensleydale creamery sales director Phil Jones said: "I'm delighted that Wallace and Gromit are back on our screens and really we're not bothered that they've taken a shine to another cheese. We have had tremendous fun and success with the dynamic duo.

"Wallace and Gromit's devotion to Wensleydale cheese is a long-lasting love affair - I'm sure this is a short-lived.

"I think the smell has knocked them senseless. Once they recover, they will see the error of their ways."

Wensleydale Creamery continues to hold the licensing for Wallace and Gromit.

A fresh range of merchandise will be produced to accompany the new film.

Managing director David Hartley said: "I can credit much of the creamery's present profile and awareness from the initial deal with Aardman. In many respects it's a perfect partnership."

In the film, which opens in Britain next month, Wallace wants to try a cheese other than Wensleydale.

But Aardman Animations refuse to disclose how he reacts to the Stinking Bishop.

"To tell you any more would give away the story," said a spokesman.