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British Gas is the oldest energy supplier in the UK. The company's history goes all the way back to 1812, when the Gas Light and Coke Company started lighting London's streets. In 1948, after the Second World War, the government took the gas industry into public ownership. In 1986 the Thatcher government sold it back to the public as British Gas plc. In 1997 the company split into two: Centrica (which kept the British Gas brand for selling gas and electricity to homes) and BG plc (the upstream gas exploration business). Today's British Gas has serviced UK homes continuously for over 200 years.

OVO Energy is a UK energy supplier based in Bristol. It was founded in 2009 by Stephen Fitzpatrick, a Northern Irish entrepreneur from Belfast, along with his wife Sophy. The two of them spent five years getting an Ofgem supply licence and saved £350,000 to start the business. Fitzpatrick has said he was frustrated by how unclear and expensive the UK energy market was, so he wanted to build a fairer, simpler alternative. OVO began trading in September 2009 and grew steadily until 2017, when they had around 680,000 customers.

Sky is one of the UK's biggest media and telecoms companies. The original Sky Television company was started by Rupert Murdoch's News Corporation in February 1989. In November 1990, Sky Television merged with British Satellite Broadcasting to create British Sky Broadcasting (BSkyB). BSkyB became famous for satellite TV with the Sky dish, and bought the rights to broadcast all live Premier League football matches. The company changed its name to Sky plc in 2014 after buying Sky Italia and most of Sky Deutschland.