I was just wondering how flexible the formations of Mk4s were. I know that the HST Mk3s sets are pretty flexible in that you can pretty much combine them in any combination that you want (such as the FGW set that was almost entirly made up of TFOs for a railtour this summer). So could you have for instance a Mk4 set made up of only TFOs for example and use it in passenger carrying service?
My other question relating to Mk4s is can they be used in service with any locos other than the 91s or the 67 drags? So could you couple up for instance a 90 to a Mk4 set and use it in service with no other modifications?
My other question relating to Mk4s is can they be used in service with any locos other than the 91s or the 67 drags? So could you couple up for instance a 90 to a Mk4 set and use it in service with no other modifications?