Scalextric-style set in need of TLC (Peachcroft OX14)

A Scalextric-style car racing set that needs some attention. The electronic bit that makes the cars go round has stopped working. Someone with the know-how may be able to get it working again or might like it for spare parts. Despite what it says on the box there are no Minis! Please see photos for the vehicles that are included. Needs to go as one lot!