Fwiw though, I think (and I've posted this on here) that the 40% threshold is ultimately set ridiculously low, 43k is not where it should kick in at all, it's ridiculous.
Ideally I think it should be around the 70k mark, but be higher - so, say, 45p, and at that point you could abolish the 50p tax, because it would be much simpler.
It would do away with this concept that a family existing on 43k is wealthy. They're not poor, but certainly not wealthy. And when you consider that the benefits cap is set at the equivalent of a 35k salary, that proves the point really - especially when that has been criticised for causing hardship to families.
1p on tax would cost us about £70 a year, I'd totally support this.
Cutting child benefit is costing us £3000 a year. But not costing any non-parent HRT payers anything. Or the dual income family on £80,000 anything. Can't be fair.