Union Energy is owned by the TUC and promises to find GMB members the most competitive domestic energy deal available on the market and guarantees competitive prices in the future, thanks to its ongoing monitoring programme. It is estimate that GMB members using this service could save an average of £154 a year, with some customers saving as much as £585.

Union Energy offers a 100% impartial service and includes tariffs for every energy company active in the UK market; from standard gas and electricity, to single fuels, green energy and capped rate products. To find out how much you could save click here