British lawmakers called on Chancellor of the Exchequer Alistair Darling to impose tougher rules to curb excessively risky practices at large banks, saying existing policy changes do not go far enough.

Plans for "evolutionary reform" of banking rules fall short of protecting society from institutions deemed "too big to fail," Parliament's Treasury Committee said in a report Monday. It demanded Darling look again at splitting retail deposit operations from riskier investment banking.

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