DAB radio specialist Pure has produced a range of its Evoke 1 radios shaped in the style of the legendary Marshall guitar amp - and Bill Wyman has signed his name to the special edition in aid of PlanetRock Radio's auction in support of Nordoff-Robbins music therapy.

A number of these special edition Evoke sets have each been signed by a member of rock royalty, with the likes of Alice Cooper, Lemmy, Eric Clapton, Paul Weller and Noel Gallagher joining Bill in the line-up. The auction also features a set signed by the inventor of the Marshall amplifier, Jim Marshall.

The auction is for the Nordoff-Robbins charity, the UK's leading independent provider of music therapy services, which provides over 30,000 music therapy sessions to children and adults across the UK.