According to Energywatch, the 6 major suppliers are operating a "comfortable oligopoly" with little competition amongst themselves. The difference in dual-fuel suppliers is only about �20 pa according to uSwitch.
I was checking this last night.We are with npower duel fuel and spend about �650 total a year (middle cottage,4 floors but only 5 rads and a combi boiler) On 3 different sites I was recommended to switch to Eon and to save �140 a year.Just not sure how true this is.On money supermarket if you do it though them you also get �30 cashback.Martin Lewis site was my link.Have had no probs with npower though,just looking to save a few quid!
some of theses DOOR STEP CALLERs are Pond life , who work for these comapnies ...in North London , they even SIGNED UP the name of a householder who had recently , DIED !! , this was sometime ago ..... the company they were working for , was VIRGIN ENERGY , and in "built up areas 2 ..a lot of these DOOR STEP ENERGY ADVISERS are ......ethnic minorities ........ surprise surprise