There were a significant number of Mk 1 loco-hauled trains running between Paddington and Oxford in the 1960s-80s, which later in NSE days, as described above, became "Newtork Expresses". They made quite a lot of use of the Relief lines, especially further out, but a service only stopping at Ealing and Slough, and running against the peak flow (not this line had anything like the commuter traffic that it has nowadays) might well have been on the Mains. In the 1970s they often had the last of the Westerns and Hymeks, later Class 47 became the norm. The stock for these services, and for the Birmingham via Oxford and for the Worcester services, was all in a common pool in Western Region days, and there were a number of half-length sets which were added to services from Worcester etc at Oxford.