The previous estimate for zero-hour contracts—which is what we are talking about—was that there were 250,000. Let us see the figures today for those on part-time work. I cannot remember the figure offhand—is it 1.5 million? There is a boundary, therefore, about what proportion of flexible working is formally on the zero-hour contracts. Rather than speculate on what the real figure is, I think that we should wait until the ONS comes out with a figure, if it is going to revise that.
On the pointed questions about self-employment rates raised by the noble Baroness, Lady Drake, rates of national insurance are clearly a matter for HM Treasury. However, we have not assumed that self-employed contributions will increase single-tier cost estimates.
I know that the noble Baroness has been a champion of this group and has genuine concerns about it losing out. As the new systems come into sharp focus—universal credit, RTI, single tier—there will be a chance to look at this issue properly when we know exactly what is happening, where the remaining issues are and then to find a precise way of dealing with it. It is simply too early, right now, to get a clean and elegant solution, but we do intend to look more broadly at crediting arrangements to examine the possibilities of modernising and simplifying the arrangements in that light. So there is a process. Her point is taken: it is just about what is the most efficient and effective way of solving a particular problem. What I do not know and cannot offer now is a timetable. It is something to be looked at some years—not a lot of years—in the future, in terms of exactly what should happen. I think that there will be a solution in the medium term. For those reasons, I ask the noble Baroness to withdraw her amendment.