reverse lights not workin

if youve checked the connections find the reverse switch on the gearbox and jump the connection with a paperclip,if the lights come on its the the switch,if not its wiring

reverse lights are not included in the mot

I'd agree with Koh.

Volt meter over the terminal will also tell you if the switch is good & giving power....

Check for corrosion in the bulb holder & check fuse Do you have green muck in the rear lights?

DS