As we are interested in debate, it would be relevant for us to hear what would be the Liberal Democrats' approach. All hon. Members have in their constituencies a few families who work under different identities, and we need a way of recording their movements around the country and between local authorities. The Government is offering a central register. My experience is that the staff at local offices of the Department for Work and Pensions will know the other names that such families operate under, and presumably they will provide that information centrally. However, what does the hon. Gentleman propose as an alternative?