The Bedford OB/Duple Vista is HOD75 of Mervyns Coaches, which has appeared in several films and TV shows, including 'End of the Affair', 'Last of the Blonde Bombshells', 'Foyle's War'.
The London Transport'decker is an RTL-class, a Leyland Titan PD2/1; the STL-class was either AEC Regent or AEC Regent II. If I can get to see it myself, I'll id the vehicle precisely.