The shadow chancellor Ed Balls has said that proposals to jail reckless bankers "is the way forward."
Mr Balls added: "The challenge now is to make sure we don't have a repeat of these issues in the future. The Government needs to act now."
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Witnesses reported hearing a "huge bang" at the venue during the concert on Monday evening.
ITV News travels to Britain's eastern-most city to gauge how the electorate will be casting its votes.
Carefully choreographed campaigns can become unstuck because voters have the power to peel back a politician's veneer.