"A film made for the Equal Pay campaign, this argues the case for women to receive equal pay for the same jobs, as opposed to the notion in the film that women were being exploited as cheap labour." (thanks Bob Wingrove, who supplied the screencaps)
Seen from behind is London Transport RT1311 (KLB560), also a pair of STLs in wartime guise:
.....also London Transport H1 trolleybus 880 (ELB880), a Leyland built in 1938 with MCCW body: