An Overall Overhaul
(1934, British Pathe)
This clip describes overhaul procedure for London's buses. Seen being stripped down is London General AEC Renown LT992 (GW5842), then LT572 (GP3521) is seen being tilt tested:
The final scene shows a fascinating lineup of London General buses including STLs and LTs; the only clear registration is for STL278(AUC524):