It was back in September but at that time the best deal I found was with So Energy. I already had an Economy 10 meter installed, am all electric, and pay a set amount monthly direct debit. They are a new company based in London, but have good reviews. Maybe online only I think. So far very happy with ease of changeover from SSE, and no problems. One of the reasons they are cheaper is that once you agree a DD monthly amount, they charge you in advance rather than a month behind like most energy companies. They also have a deal where you can pay more in winter/less in summer. There were a couple of companies cheaper in Scotland, but I had difficulty getting through to them by phone with queries, so left well alone.