By Andy Silvester There is nothing wrong with independent thought. Indeed, avoiding ‘groupthink’ is now one of the driving lights of good corporate governance. Having competing views around the table has been a hallmark of leaders from Abraham Lincoln to Margaret Thatcher, and as a rule it creates better decisions and proper stress-testing. There has of course been one key facet of all of those occasionally fractious policy debates: they tend to happen behind closed doors. At the Bank of England, meanwhile, it is now de rigeur for the nine members of the monetary policy committee to contradict…