Not sure it is 100% correct but when my missus old Punto had it's MOT the guy said he would have to fail the car as the rear wiper was not working at all, I took it off and he said it was not a fail as it had to be fitted to be defective
Anyway I decided to delete my wiper in April and we have had the wettest few weeks for years and I haven't missed it once
IF it's fitted, it has to be working
If it's not fitted, then it's not considered a fail. Strange MOT rules
Mark, i haven't got a 350 yet so i won't be coming to wales and i thought turning up at your house uninvited would cause a bit of concern