Jeremy Clarkson appears to have performed a rather abrupt U-turn on his rather less than favourable stance on sat navs, and has agreed to become the voice of a new TomTom system.

The outspoken Top Gear presenter will not be echoing the dulcet tones of the gently persuasive standard voice though, and those that download the package will be faced with instructions telling them to perform a handbrake turn when safe to do so rather than performing a U turn where possible.

He told The Sunday Times: "It is mostly about the tone of voice I use. There's a tone of voice I use when ordering people to do things, so, "I said left, left, I said left", you know, that kind of thing.

"It's not a gentle sat nav voice, put it like that."

The upgrade, which will cost motorists around £8-£9 according to TomTom, can either be downloaded onto existing systems or bought as part of a specially branded Top Gear system.

While there remains the possibility of Clarkson's co-hosts James May and Richard Hammond also putting their voices to the system, this has yet to be agreed according to a TomTom spokesman.

However there will be a chance to have the other member of the TV show's presenting team guide you, as Clarkson confirmed their 'tame racing driver' will also feature.

"You can put it in Stig mode, apparently, which is when nothing happens. It doesn't speak to you at all. So you can either have Stig or me and personally I would use the Stig most."

The upgrade is due to go on sale on 4 October.