If you have ever wondered, there are around 20 different gas and electricity suppliers in Britain. They all offer a range of tariffs, from cheap deals to ones that help you go green, but it’s fair to say that six of them in particular dominate the energy market. (see http://www.confused.com/gas-electricity/articles/the-big-6-a-confused-com-guide-to-the-uk-s-top-energy-providers)
Company
Affliates/ subsidiaries
Parent
Location
EDF
EDF SA
France (state owned)
npower
RWE
Germany [...]
