Many thanks - and sorry for what looks like an error - I have tried adding up all the single decker combis from the list at http://www.petergould.co.uk/local_transport_history/fleetlists/manchester2.htm but it comes to nothing like 67... so I must be in error which is a bit worrying. According to my referencing the information came from  http://www.mtms.org.uk/ but that site has now  I think changed substantially. Thanks very much for this. PS: My dad really like this tram. Best wishes (  )