OK... so I have now got to the bottom of this. All I can say is that it makes a huge difference to talk to someone with some customer service skills. I called again to cancel (as moving house) and discussed again with a different person. Luckily, he could be bothered to look into the matter rather than just proclaim that the figures stood. Basically it all relates to our old friend the estimated reading. What confused me is that I had given readings over the phone through the year, so the sudden leap in that quarter had to have been for that period. Wrong. Having an old dial meter, it turns out I had taken the readings incorrectly (easily done if you've ever seen one of these). As the readings I gave over the phone were so far out (starting with a 6 rather than a 4), they just ignored them. But didn't tell me. So when the meter was changed and the final reading taken, low-and-behold the estimated readings used instead were totally out. So I had a sudden hike in my electricity use which seemed to be from a single quarter, but was in fact from the entire year. A word of warning then for anyone giving readings for dial meters over the phone - make sure that these are on the bill & not just estimates! Thanks everyone for your help.

Hi, DX I know just how you feel. At the moment I really need my energies to be ploughed into my house move, work, and looking for work - triple-trouble! The temptation really is there just to pay and leave it. But it is good to know that these odd anomalies do happen, statistically it must be so. Scientists will take three readings to prevent human error, I'm sure meter readers are not immune to the odd mistake (not that it could ever be proved). As Daveshug suggests [thanks for the reply], it had crossed my mind that I've just been a lucky guy who's not been paying enough for a long time. Maybe I should just keep it to myself! But then the meter was changed right at the end of the bill period, so it would have had to be an extremely large increase in a small time. Would 2257kWh be an unexpected amount for a 2 person end of terrace I wonder? It really is a mystery that requires me to do a bit of work, let me get my calculator out again and have a couple of Scooby snacks. I'll let you know how I get on. Thanks.

Thanks DX and Nottslad, I can't help but feel the change in meters is no coincidence. Unfortunately for me the readings seem to match up. A close scrutiny of all bills and readings made is in order I think. But it must be far to odd to be real - I just hope I can prove that. After a lot of badgering of the call centre guy yesterday he actually relented at the end of the call and said he would pass the matter on to another unit. Hopefully it's with the people you mentioned Nottslad, albeit my call centre guy said there would be no change in outcome. Looks like offgem will be my best bet if (prob when) the PS route dries up. Unfortunately, this has managed to coincide with me selling my house, I actually leave it in just under a week. So weekly readings are not any good, but I'll try taking readings at night over the next few days and over 24hr periods. Will at least give me something to go on. Course the upside is that I don't have to pay the massive hike in my direct debit that SP has given me Unfortunately means I have to pay the bill so as not to cause a mess for the person moving in. I'll make it clear to PS that this isn't de-facto acceptance of the readings, but no doubt will not help my case. Thanks again, your comments are greatly appreciated.

Hi all, I hope that someone may be able to offer me some advice on this one. I've just had a gas/electric bill from Scottish Power that shows and incredible increase in my electricity usage that I simply cannot believe I have done. I have been with the company for over two years, paying a fairly consistent amount (give or take the odd price rises and falls) and had my meter read on a number of occasions. To give some perspective, my reading for the same period last year shows a usage of 62kWh for the quarter (fairly average across my previous bills). My reading for this bill is 2257kWh. I have made no change in my energy use behaviour in this time. The only changes have been: - A reduction in the number of people in the household from 2 to 1 over 2 of the months - The inlaws staying for 3 weeks (and I'm pretty sure they wern't dolling out free electricity to all comers while we were out) - A meter change (from dial to digital - 25 days before bill) - What may well have been an electricity surge the middle of the night (prior to meter change) at beginning of bill period. I am stumped. SP have simply said "we've read the meter, you used the electricity, you pay us" (I'm paraphrasing). But the increase that is seen here would surely require a massive increase in my consumption brought about by a significant change in my behaviour. This has simply not happened. Can anyone think of any reason that my bill has spiked, aside from electric fairies stealing it from my toaster!? Could the meter change have been done incorrectly - the reading was left with me and matches the bill? Is it even possible for me to create this increase, even if I left all of my (generally efficient) appliances on? Have I simply been a lucky fella who has been paying far too little on an old meter (although the new meter was only installed 25 days before the bill)? I'm at a loss. Any suggestions or advice are extremely gratefully received. In particular has this occurred to anyone before, and what was the cause? Thank you.