If you have a pension and claim tax relief then you can end up paying a lot less than the tax bracket percentage as you get all the tax back on your pension.
Salary sacrifice share save schemes, Cycle 2 Work and child care vouchers are other good ones, as a sort of tax saving. You don’t really see the money in you pocket, or maybe not for a while at least, but it makes something you have to buy more efficient tax wise.
Also useful for child benefit in the > £50K earnings, but that’s a whole other thread I’m keeping well out of!