What is almost certainly an official pre-delivery shot of City Coach Company LD8, NVX305, a Leyland PD1A with Roberts L27/26R body, new in 1948 - clues are the absence of any licenses in the license holder in the cab and missing unladen weight figures.
The maximum speed of 30 mph and the legal owner are in place ...
City Coach Company Ltd, William Frederick Mallender, Secy., 725 Lordship Lane, Wood Green, London N22.

It later passed to Westcliff, then Eastern National with fleet number 1125, lasting until early 1963.