Is This a Legal Tax Loop-Hole?

In November 2015, George Osborne disclosed plans to restrain the buy-to-let (BTL) market, implying its growing attractiveness was leaving aspiring first time buyers contesting with landlords for the restricted number of properties on the market. One of things he brought in was that tax relief on BTL mortgages would be capped, starting in April 2017. Before April 2017, a private landlord could claim tax relief from their interest on their BTL mortgage at the rate they paid income tax – (i.e. 20% basic /40% higher rate and 45% additional rate). So, for example, let’s say we have a Bexley Borough landlord, a high rate tax payer who has a BTL investment where the rent is £900 a month and the mortgage is £600 per month. In the tax year just gone (16/17), assuming no other costs or allowable items … • Annual rental income £10,800. • Taxable rental income would be £3600 after tax relief from mortgage relief • Meaning they would pay £1,440 in income tax on the rent...