My hon. Friend is making a powerful point about the mansion tax. Has she followed the Government’s argument on clauses 97 and beyond, which are about the annual tax on enveloped dwellings? Has she noticed over the past hour that Government Members have not made a single argument against the administration and operation of a mansion tax? All that they can come up with is particular cases and arguments about how many properties will be affected. The administration of a mansion tax would not involve changes to council tax or other such matters. The annual charge could be used as a broad foundation of a mansion tax.