(2013, Essex Media Workshop documentary)

Documentary about children evacuated in Britain in the Second World War.
Two buses are seen transporting child evacuees. First is AXU657, a 1934 AEC Regal 0662/Harrington of United Service Transport of London, which survived long enough to be rebodied with a full fronted Harrington body in 1949:

The second appears to be a Dennis Mace, possibly KYD135: