My 2 year fixed tariff with Shell Energy ran out in August this year. When I took it out over two years ago, they then quoted me a 25% saving per month for both gas and electric on the price I was paying previously, which I was more than happy with. After a couple of months they reduced my payment again by a third, so I was paying less than half the figure that was paying pre Shell. This lasted until my tariff ended in August, and I was a nice amount in credit which they refunded to my bank. I got 'compare' quotes on line, but decided to ring Shell direct, and they estimated my new payment would increase by about 50% with the energy price increses. Still good in the current climate, I thought. So I fixed for a further 2 years, and they have notified me last month that my payments were dropping again by around 33%, and I am in credit as well! So my duel fuel payments are now around £100 pm
I have been very impressed with Shell Energy when you hear all the horror stories about fuel providers. And they are a very cash rich company and are extremely unlikely to go bust too.