Dormant Bank and Building Society Accounts Bill [Lords]

How confident is the Minister in the figures provided by the British Bankers Association and the Building Societies Association, particularly given that The Times was reporting up to the end of 2006 that the amounts involved in dormant accounts could be up to £20 billion? Are the figures given by the Minister for a 15-year dormancy or is there an aged analysis of dormant accounts from a more recent period—perhaps with a three-year dormancy? These will effectively be brought in over time.