just rushed downstairs thinking I was wasting electricity as I'd put the oven on 1hr ago so I could stick a Morrisons bread and butter pudding in the oven for DH and I to ahve when he gets home.
Opened the door to put the thing in.......it was cold - I'd not actually swtiched it on - just turned the temp dial round and not the power
I've now switched it on - but of course it won't be ready for another 1hr (the pudding that is).