Is Jeremy Hunt’s ‘British Isa’ worth having? The new £5,000 tax-free allowance for UK equity investment comes on top of the existing annual £20,000 Isa limit, so on the general principle that it makes sense to maximise tax-efficient savings, the answer might be yes. But will it achieve the Chancellor’s aim of allowing patriotic savers to buy into the growth of ‘the most promising UK businesses’ while supporting them with capital to expand? To that, I’m afraid, the answer from the professionals has been a resounding no.