In the light of the convertible boom, Volkswagen has just launched a £15,395 soft-top version of its new Beetle. And BMW announced last week that it is to sell a soft-top version of its UK-built Mini from next year. Catherine Alty, business manager for Privilege, said: 'We have noticed a 15 per cent growth in the convertibles segment of our business between 2001 and 2002.