It is the switch. It is a soft-start switch and the only fix is to get one....if you can.
I'm in contact with B&Q's spares dept. at the moment and it's a bit slow and negative up to now. If you go on the B&Q homepage you'll find the route from there. These were built only for B&Q and there is no web contact for them as they are just a 'name' for one of B&Q 'companies'.
Ray Cooke
April 2013