(29 Jul 2019, 11:48 am)tyresmoke wrote The NHS had a tender out last year for their staff transport requirements, with incentives for operation of clean vehicles especially hybrid or full electric. Arriva's route 46 is covered by part of this with the extension from Haymarket up to General Hospital - indeed there was recently a registration splitting this part of the route off with the new service being numbered 47. Putting two and two together would suggest this is a likely candidate