Energy firm SSE has scrapped its plan to merge its retail business with rival Npower, blaming “very challenging market conditions”.
The deal would have created the UK’s second-biggest energy supplier.
The two said last month they would have to renegotiate the deal, which had been cleared by the regulator, because of the government’s new price cap.
The cap will keep energy bills below £1,137 a year for “typical usage” and is due to start in the new year.
Energy regulator Ofgem has said the cap will save 11 million customers an average of £76 a year on their gas and electricity bills.
More than half of all households in Britain are on default tariffs because they have never switched or have not done so recently.
The merger would have seen SSE’s household energy division, SSE Energy Services, combined with the retail operations of Npower, which is owned by Germany’s Innogy,
However, in a statement, SSE said it had decided the tie-up was no longer “in the best interests of customers, employees or shareholders”.
The deal was affected by several factors, SSE added, including the performance of the two businesses, the energy price cap and changing energy market conditions.