When Ed Miliband was questioned earlier this week about Labour's links to the Rev Paul Flowers, the disgraced ex-chairman of the Co-op Bank, he tried his best to avoid the issue. "He was involved in the Co-op and that is no longer the case," said the party leader. "I think we will leave it there." Unfortunately for Mr Miliband, it cannot be left there. The more information that emerges about the unsuitability of Mr Flowers to run a major bank, the more pertinent the questions about who knew of his shortcomings and why nothing was done to protect the institution and its customers.