Metro Bank came top of the charts in an independent survey conducted by the Competition and Markets Authority (CMA).  This followed a regulatory inquiry into the banking sector. CMA posed the classic Net Promoter Score question, how likely are you to recommend your bank to others.  Metro topped the UK charts with 83% of respondents saying that they would encourage others to use Metro. Other banks that scored highly included First Direct in 2nd place and Nationwide in 3rd. Bottom…