Traditional Mini repair and accessory shops in Britain are under siege from German giant BMW. The maker, which retained the rights to the marque's name after selling Rover to Phoenix, is threatening firms using the word Mini in their company title with legal action. As the manufacturer prepares to launch its new Mini later this year, it is targeting several dozen firms for alleged copyright infringement. Garages are being forced to sign a legal undertaking that includes a clause forbidding them to service, repair or supply parts for Minis without BMW approval. They also have to show BMW all promotional material bearing their company's name. A solicitor contacted the [shop dealing in Mini parts] in Nottingham in May. But even after changing its name to Surf Blue (a Mini paint finish), the owners said BMW pursued the firm for five weeks before conceding it had no case to answer. [Business owner] of [another shop dealing in Mini parts] in Enfield, London, added: "They're bully-boy tactics, but we haven't changed our name." Mike McHale, a spokesman at BMW GB, said: "As long as companies don't try to represent themselves as part of the official Mini operation, they're okay."