Energy suppliers, charities and Money Saving Expert founder Martin Lewis have pledged to work together on a series of measures aimed at supporting customers through this winter. These include developing a universal tool to help billpayers understand the support they could be due and where to access it. Suppliers have also agreed to explore opening up data on tariffs only available to existing customers and on how direct debit levels are set. It comes amid predictions the energy price cap could rise to £3,244 from October.