London�*s mayor has called on the government to prioritise key workers and reserve petrol stations for hospital staff, care workers and cabbies to keep london moving. more on that in a moment. but first, as the transport secretary sought to reassure motorists that there was enough fuel to go around and not to panic buy. 0ur correspondent tom edwards has spent the day in his hertfordshire constituency in his to see how people there are feeling. a new town with a new problem — welcome to welwyn garden city where fuel is scarce and queues are plenty. the local mp here in welwyn and hatfield i...