SSE and npower, two of the UK’s biggest energy companies, are in talks to combine their household energy supply businesses in potentially a big shake-up of the market.

The two firms have said that they are in advanced staged of talks to create a new independent energy supply firm. The new business would combine the nearly 13 million customers they currently supply with electricity and gas.

If the move goes ahead it would see the end of two of the biggest brands in the energy retail market, and the so called big six. The move is likely to raise competition concerns as the market shrinks to the ‘big five.’