Spark Energy has revealed it completed deals worth an estimated £5 million in the past three months.

The power company, which is based in Selkirk in the Borders, supplies gas and electricity to letting agents.It now has 50 partners, including Harvey Scott Properties and Howards Residential Lettings, which between them manage more than 20,000 properties in Norfolk and the north-west of England.

PJ Darling, Spark’s Chief Executive, said: “We’ve had a lot of success for a company that isn’t even two years old. We are increasing revenue by 20 per cent month on month.”