There was definitely not one of them on. Looks like I have been driving for years without one! Unless it is in part of the steering boot? Edit: just looked in the gaiter, not there either. But thanks for the heads up! Could have been in trouble there. Right, the part is called a "stop washer" and has the following part number on servicebox:
405825
Cost of £1.93 from Peugeot.
Just a case of getting there on the bus
405825
Cost of £1.93 from Peugeot.
Just a case of getting there on the bus