20 NOVEMBER 2007

In billboard ads for a new green campaign Heather Mills displays her sense of humour by poking fun at herself - all in the name of vegetarian and vegan charity Viva!.

Environmentally conscious Heather, who has worn a prosthetic leg since a 1993 road accident, posed next to the slogan "You haven't got a leg to stand on!".

The tongue-in-cheek ads, which aim to promote veganism as a way of reducing carbon emissions, are just the latest publicity effort by Heather - who has been actively involved with the organisation for years.

"Eighty per cent of global warming comes from deforestation and (keeping) livestock," she said, speaking in London's Hyde Park on Monday. "I'm not telling people to go vegan overnight. But if they stop drinking their cows' milk lattes, maybe this sort of thing won't have to happen."

Photo: © Alphapress.com
The ads, which bear the slogan "You haven't got a leg to stand on!", are a brave play on her own circumstances - she lost the lower part of one leg in an accidentPhoto: © Getty Images
Photo: © Alphapress.com
Sir Paul's former wife has been campaigning for Viva! for years. On Monday she gave a speech promoting veganism as an environmentally friendly lifestylePhoto: © Getty Images