One week you’re fighting to survive the dance-off amid vicious backstage rivalries, the next you’re scoring a perfect ten from Bruno Tonioli for your shimmering tango. As it was on Strictly for Debbie McGee, so it was — well, almost — for Philip Hammond at the despatch box. Unlike many of the Budgets of his predecessors Osborne and Brown, this one did not unravel immediately or prove full of black holes and political tricks.