Checked the fuses?
Checked the fuses?
Does rear wiper come on when you have front wipers on and select reverse?
If not then reverse switch is stuck. Mine is at the minute.
Cost about £20 from motor factor for a new sensor. Green plastic plug goes in the back of the gearbox.
It's not an mot fail if it's not working but confuses people when you start unexpectedly reversing towards them so best to get it fixed.
I had the same problem, £17 for the switch from the local factors, 10 mins to fit. Sorted