Calculus Capital has invested £3m in Open Energy Market, an online platform that helps companies secure the best deal with energy suppliers.

Businesses provide details of their usage for all major suppliers to submit bids for the contracts through a live reverse auction process.

Dairy Crest, EasyJet, Southampton Football Club and London Business School are among more than 200 businesses and organisations that have used the Open Energy Market platform to find the most attractive contracts with suppliers.