THE Queen and the Duke of Edinburgh have announced plans to convert the Royal Household's fleet of cars to liquefied petroleum gas. The initiative could provide the impetus which sees gas power take off as a major vehicle fuel in Britain, according to the UK LPG Association.

The royal fleet includes Jaguar, Rolls-Royce, Daimler, Rover and Metrocab models. The gas move comes more than nine years after the Queen announced the conversion of the royal fleet to lead-free fuel.