Hello Teak, check to see if you have economy 7 if you don't then request it from your energy supplier as it's free to have the meter fitted, if they try and charge you just tell them you will be leaving and getting your energy from elsewhere i.e British Gas, Eon, Swalec, there are loads out there.
If you have Economy 7 then put your washing machine and tumble drier on timers so they only work between the economy 7 hours which is normally 12:30am to 7:30am, do this and you'll save a fortune, Ok you might have to get up a little earlier to put your loads of washing in but the economy 7 tarriff is a third of the price of normal daily rate electric. The timers are available from B&Q for about �10 for 3.....