By Lars Mucklejohn Griffin, the UK’s newest fully operational bank, has secured a $24m (£19m) funding round as it looks to take on new customers for its Banking as a Service (BaaS) platform. The latest funding round follows a £11m investment announced last June and is led by MassMutual Ventures, NordicNinja and Breega, with participation from existing investors Notion Capital and EQT Ventures. Having been authorised as a bank last March, London-based Griffin has now received regulators’ approval to exit “mobilisation”, when it operated with a banking licence but under restrictions. Griffin, fo…