Energy suppliers are allegedly making larger profits than they admit. The Sun Newspaper claimed they could be making a 24% profit margin, almost six times higher than figures provided by regulator Ofgem. The newspaper based its claims on a PwC report commissioned by Energy UK. Energy UK rejects the claims saying they were "a misrepresentation of facts". But now Business Secretary Greg Clark has started an investigation. To get a clearer grasp on the situation and the upcoming investigation, Matt Cox spoke to Senior Analyst at NRG Expert, Edgar van der Meer.