I am convinced there is something wrong with my meter - who should I contact to get it tested in this way? Would an electrician have the equipment, or is it more specialist?

Thanks for your suggestions. The monitor I have tells me how much electric is being used at any given time, and I've tried switching the fridge and freezer off completely this morning and it seems to make very little difference to the usage - so they don't seem to be the culprits. There is an immersion back up for the boiler, but it was ...

I bought a monitor to self check my electricity usage last year and have been staggered by how much we seem to go through - but put it down to being at home a lot with two small children and doing lots of washing / drying / cooking etc, but having been on holiday last week for the first time since having the monitor I am now completely at a loss ...