Thanks for the reply, it was intermittently stopping mid stroke but now it does not move from the stop position and I can't even hear the motor trying to work, fuse is OK.

Sounds like the brushes are worn down or, as on mine, the brushes are sticking in their holders. In both cases you can fix the problem yourself.

 

Great thank you. It's not as though the rear gets a lot of use and it's only four years old?