(1976, Phillip Mawdsley, Nick Stringer, Valerie Lilley)

First part of a Liverpool-set trilogy by Terence Davies.
Two Merseyside PTE Leyland Atlantean PDR2/1s with Alexander bodies pass in traffic; the lead is 1173 (XKC800J), new in 1971. It's followed by 1143 (UKA594H), new in 1970:

A boy and his mother ride on Merseyside A87 - this AEC Regent III/Crossley was new in 1954 to Liverpool Corporation. It doesn't appear to carry any fleetname, was it actually out of service by then? Note the Crossley-designed 'tin front' specific to Liverpool.

There's also a glimpse of another MPTE Atlantean: