Please take real care before doing any business with company, their mathematical skills leave a lot to be desired and seems to be wholly manual and open to typos, arithmetic errors and numbers put in the the wrong boxes, so you may end up having to do lots of your own maths and accountancy if you want a fair and correct bill! When I left, I got a bill for over £500 for the last 20 days electricity. This was clearly an error on the invoice where someone input the starting reading for the whole contract, not the carry forward from the previous bill...! On further investigation, every bill included free mistakes. It then took a further 6 weeks with lots of red bills, text messages and calls/emails to customer services to get it sorted. As fast as you agreed things with one person, another was resending or demanding payment for the original incorrect bill. The customer services, complaints and debt recovery departments, all work with information which is weeks out of date and do not seem to be able to communicate. The final solution was for them to tear up every previous bill and start again.... and even then it took 2 attempts.