The bulk of the Paddington dmu services were covered by the big batch of Pressed Steel Class 117 3-car units, as they had been since they were built 30 years earlier. Although they got a bit mixed with other WR sets towards the end they were still the vast majority. They lasted surprisingly well, and often were still in the original vehicle order as delivered several decades previously - the WR seemed to make more effort with this than elsewhere.
There were a number of peak hour full sized Mk 1 trains with Class 47 (and various locos before) running Paddington to Oxford, stopping at the stations beyond Reading and also providing Paddington to Reading peak period capacity.
The branches used various combinations of the associated Pressed Steel single cars, some with the driving trailers, some two single cars coupled, some on their own.