Edinburgh was AEC and clydesdales changing to mastiff and bedford TM.
Night trunks were- Nottingham, change over at 177 Flyover on M1
Dunstable, change over Forton M6
Birmingham, changeover Burton services M6
Leicester, changeover at Atlas depot at Newton ayclffe.
There was latterly a changeover at Carlisle. Cant remember where that was with Leeds seems to come to mind?
Aberdeen and Glasgow depots ran to Edinburgh each night.