The Mackintosh Man (1973, Paul Newman)

In an early London scene, an RT family 'decker passes Trafalgar Square, followed by an two AEC Routemasters, an RML and an RM:
"When Newman escapes from his 'safe house' in Ireland he catches a bus to the nearest village - it is a red lower and white upper CIE Leyland - either a Leyland Tiger Cub or very possibly a Leopard. The machine has "lollipop stick" ad boards on either roof panels." (thanks Scot Fergie) Gary Manahan confirms this as CIE E106 (AZD156), a 1962 Leyland Leopard L2/CIE. The footage is short but rather good!