Exportable Benefits

On the point about cost, the Minister has clarified the answer that he gave Parliament about what would happen if the past presence test were used, and without backdating. Has the Department made any estimates of the costs of the two elements? How much would it cost if claims were backdated to the point when people left the UK, and what would the situation be without the past presence test? Has the Department made those estimates, and can the Minister furnish us with the information today, or include it in his letter to my hon. Friend the Member for North Thanet?