When Felicity Young and John Dunbar are sitting in the lorry the "scenery" passing behind them is obviously a revolving illuminated drum with foliage painted on it.
When Jean opens the curtains the next morning the studio lights are switched fully on before she has had a chance to draw back the second half of the curtains.
When Ricky is sitting in the Lincoln in the Portobello Road the reflection of the camera crew is visible on the driver's door.
At the end when Johnny falls down after being shot by Ricky the shadows of the camera and cameraman are visible.