Continuity mistake: When Stan stops the bus to collect his washing from the laundrette there is a white mini parked outside the laundrette with a brown car parked in front of it. But when Blakey confronts Stan coming out of the laundrette with the bag of washing, the brown car has gone without enough time for it to start up and drive off.
Continuity mistake: The female driver is chastised by the general manager for following the wrong diversion signs. At the end of the preceding scene, we see the bus VNO 862 with a saw advert. This advert is white text on a blue background. When the bus pulls up to the inspector and general manger, the advert can be just seen in the top of the shot. It is now brown on a white background. Plus it's now bus WNO 476.
Continuity mistake: When Stan sends a female driver on a fake diversion route, in the first scene the driver gets into bus WNO 476 (a no. 33) - the bus has KP nuts ads on the front and sides. In the next scene we see bus VNO 862 (a no. 13A) with Lyons maid and SAS adverts. This bus is then used for the remainder of the diversion gag, with close ups of the same female drivers as at the start.