OK, thanks for that.
I've managed to find this model number on one of my technical database discs in the office.
However, according to the service manual, E50 refers to problems with the motor circuit of your appliance.
Unplug the appliance for 10 minutes to reset the electronics.
If the fault persists then there are 3 possible causes.
The motor itself, the wiring or the electronic control board.
Click here for the control board
Click here for the motor
It's highly unlikely to be a wiring fault, I've not come across 1 that was faulty wiring.
It will be motor, control board or both that end up requiring replacement.
Given the price of the parts I would suggest getting a fixed price, parts and labour, quote from http://www.repaircare.co.uk/
This way you would have a warranty on the parts and repair that you won't have if you fit the parts yourself.
It may also work out cheaper than the parts.
Hope this helps
Let me know how it goes or if you need more help