By Lars Mucklejohn Challenger bank Cashplus will rebrand as Zempler Bank this summer to reflect its new range of digital products and authorisation as a bank. Speaking to City A.M., founder and chief executive Rich Wagner said the company had “changed a lot since we came up with the Cashplus brand, not least the big milestone of being authorised as a bank back in 2021”. Wagner launched the company with an e-money licence in 2005, and it secured a full banking licence from the Prudential Regulation Authority 16 years later. “As a founder, I’ll always have a personal connection to the name Cashp…