Although the bill team has a wide knowledge of what those risks might be, during the consultation process we went out to discuss with local authorities, the Association of Directors of Social Work and all sorts of other bodies what they thought the costs would be and what numbers they thought would emerge from the proposal. They found it difficult to produce any concrete figures for us, so we had to come up with a scenario-building process, in which we used the information and the range of numbers that we got from those organisations.