Look out for fireworks when Mayor Livingstone goes public on his plans for trams running through central London, following the success of the Croydon Tramlink scheme. Will they be powered from cables above or below ground? Will English Heritage be happy if it is the former? What tram design will be employed? One thing is certain - trams are not an 'if ' but a 'when', and will mark the mayor's transport policy initiative to gear people up for the next mayoral election. Who cares about motorists?