“We recognise more work needs to be done to create a level playing field by supporting new banks wanting to set up business, as well as helping to grow established banks,” Anthony Browne, chief executive said. Mark Mullen, chief executive of the “mobile-first” challenger Atom Bank, criticised the way in which the CMA has told the big banks to police the changes it wants. He said: “It’s like trusting a pyromaniac with the security for a fireworks party. It means that the new banks like Atom will have little direct say in shaping the future.”