Alistair Phillips-Davies, Chief Executive of SSE, said:
"We welcome Ofgem's liquidity measures, which develop and build on practices we've introduced in recent years so that they will have to become business as usual for other companies who have lagged behind. But all measures should apply to every player in the market to ensure there is a more liquid and transparent market for all.
"We will keep looking for further measures to enhance transparency and change in the interests of customers."