The mainstay of the motive power was the class 30/31. Baby Deltics were used for the Cambridge Buffet Express services aswell as the more mundane suburban non-corridor stock duties, to a lesser extent than their Brush built counterparts. In the early days, the first members of classes 21 and 26 were also used, before being transferred to Scotland. The stock was almost exclusively MK1 suburban coaches by the end of the 1960's, many still in maroon livery. The trains can be modelled using Bachy MK1's except there was usually a MK1 suburban SLO in the rake, which Bachy haven't done, but DC kits have produced a kit for one. Quad and Quint art stock would have also been a feature up until the late 50's/ early 60's. A motley rake of Gresley, Thompson and BR MK1 coaching stock can seen in photo's of the Cambridge Buffet services. Although the Baby Deltic's were based at Finsbury Park, they were often stabled at Hitchin and were worked by Hitchin loco crews.Headcodes were usually 2B6X. 2B65 and 2B66 can be seen in a lot of pictures of these services. Interestingly, the Baby Deltics were officially banned from the widened line services to Moorgate due to excessive smoke in the tunnels. There is a cracking shot by David Percival of D5906 making off from Farringdon on a rake of MK1 suburbans in 1968 in a cloud of smoke, which appeared in his article on the class in Motive Power magazine.