What I told the Chancellor he should do to improve the marriage tax allowance take-up

Introduced in April 2015, the marriage tax allowance (MTA) is free cash worth £432 for many married couples and those in civil partnerships. Yet surprisingly only 16% of the 4.2 million eligible have claimed it. I’ve been talking about it a lot (well, free cash is free cash), and a good chunk of the low uptake is...