Hello folks.   I've found on a  number of occasions that when trying to find part numbers via websites like this, I can't work out which of a few possibilities is the right part number because I don't have full information of the car's PR codes.   For some reason they don't all seem to be listed on the stickers in service book and boot floor.  This usually means having to ask at a dealership etc., where they seem to be able to disambiguate via reg/VIN number filtering.