Kings Cross trains never got further than the bays at the south end of Cambridge station
From 1961 to 1966 the 3.5 pm from Kings Cross ran through to Ely.
At dieselisation the GE services got Class 37s
Brush Type 2s worked most Kings Lynn services from September 1958. In 1961-64 the main traction was the 1600hp Brush Type 2s. The EE Type 3s only had a few Cambridge line workings when they were new and only became dominant on the Kings Lynn trains once the Norwich line got Brush type 4s in 1965.
the GN services, always notably lightweight at maybe 6 or 7 coaches, got Class 31s.
The Buffet Expresses were load 7 in the 1960s and later load 8, though I've not been able to date when the change took place. In the 1970s the 1530 up and 1714 down were load 10, and booked for class 47s.
The Buffet Expresses also got diesels very early, with the BRCW and NBL Type 2s in 1959. The Baby Deltics also had a number of turns on the Buffet Expresses in the 1960s.
Regarding town/gown, i however did read that the Cambridge University Railway Society long ago had their annual dinner in a hired Liverpool Street line restaurant car - in Thornton Heath depot sidings at Stratford!!
The Cambridge University Railway
Club Annual Dinner was on the train between London and Cambridge until at least 1965. Until 1960 it was in a restaurant car attached to the 8.3pm Liverpool Street to Cambridge stopping train. From 1961 to 1965 the restaurant car was attached to the 8.10pm/8.25pm Kings Cross to Peterborough, detached at Hitchin, then attached to the 9.30pm Kings Cross to Cambridge.
I'm not aware of the Cambridge University Railway Club Annual Dinner being held in carriage sidings. And, as far as I'm concerned Thornton Field is the correct name, that's how it appeared in working timetables. The Great Eastern Railway left off the
's, just like they did at Coldham Lane Junction. Thornton Field sounds like it should be a sports stadium, and now that's what it is.