Formula One commentator Murray Walker has lent his voice to children's cartoon Roary the Racing Car.

The 85-year-old said he had "enormous fun" recording the two special shows, in which he plays himself.

Roary the Racing Car follows the adventures of a bright red single-seater and his racing car friends.

The show is narrated by former racing driver Sir Stirling Moss and also features the voice of Peter Kay as Big Chris the mechanic.

"So many of my friends with children, literally from all over the world, have told me how much they enjoy watching Roary the Racing Car with their youngsters," Walker said.

"So I was delighted when I was invited to join the cast and absolutely enthralled to take part in the studio recordings with Peter Kay and the rest of the jolly talent.

"They have been the most enormous fun and I now feel that I have achieved fame at last by becoming part of such an outstanding entertainment."

Walker spent 52 years commentating on Formula One, first for the BBC and then for ITV.

For his animation debut, he will be seen commentating on races at Silver Hatch - where Roary the Racing Car lives.

The two episodes air on Channel Five and digital channel Nick Jr in late autumn.