Alex Neill, Which? Managing Director of Home Products and Services, said:
“Mergers of such big players in essential markets, such as energy, are rarely a good thing for consumers, especially given the low levels of competition.
“As both businesses struggle on customer service, coming in the bottom half of our satisfaction survey, the competition authorities must take a hard look before allowing any venture to go ahead.
“Any consumers unhappy with their current energy provider should consider switching to a better deal.”