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.
Plot hole: When Olive gets in the motorcycle sidecar to go to hospital to have her baby, her weight lifts the bikes rear wheel off the ground. Stan rides on the rear of the bike seat to keep the wheel on the ground. However, Stan never intended to get on the bike until this problem occurred but he was holding a motorcycle helmet from the start of this scene.
Factual error: When Blakey nearly catches Jack in turnaround Betty's house, Blakey tells them to get moving as they are late. At first they both go through the passenger door of the bus at the back before Stan goes round the front to drive, but the bus drives off too soon for Stan to walk to the front, climb in the cab, start the engine 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.