Each week, The Open University and BBC Radio 4 team up to bring you the sharpest views from the top of business.
Turning up the heat: the new energy companies breaking into a market dominated by big established firms. Evan Davis meets two small entrants to the sector to find out how they're gaining market share.
Is the strategy to compete on price, customer service or green credentials?
He'll discuss the role of the price comparison websites in encouraging customers to switch providers and hear how some smaller companies are cutting gas and electricity bills when their bigger rivals aren't.
This week's guests:
Dale Vince, Founder and CEO, Ecotricity
Stephen Fitzpatrick, Founder and Managing Director, Ovo Energy
Ann Robinson, Director of Consumer Policy at uSwitch.com
This edition of The Bottom is first broadcast on BBC Radio 4 on Thursday 20th March 2014. For more details, and to listen online where available, please visit bbc.co.uk.