In 2018, Big Six energy suppliers Npower and SSE were given the go-ahead by the Competition and Markets Authority (CMA) to merge their retail operations, supposedly docking the group to a Big Five. However, the proposal has failed to see signatures on paper
Scottish and Southern Energy (SSE) is a large energy supplier in the UK belonging to the Big Six key players in the gas and electricity markets. It is headquartered in Scotland and began as the Southern Electric Board in 1947. It is the second-largest UK energy company following British Gas.