Boris Johnson has said addressing the issue of so-called conversion ‘therapy’ is “complex” – as his government said it would bring forward plans to ban it in the UK. The PM described the practice of trying to change someone’s sexuality as “repulsive” and “abhorrent” when asked about it on a trip to Belfast on Friday. Three advisers have quit over claims the government is a “hostile environment” for LGBT people, increasing pressure to take action. But Mr Johnson said that although it was a “technically complex” problem, he was committed to making it conversion ‘therapy’ illegal. “I think this practice is repulsive and I think it’s abhorrent and I’m sorry these advisers have gone but be in no doubt that we will deal with this issue,” he told reporters. “It is technically complex to deal with but we’re determined to take further steps to stamp it out.” On a visit to Scotland today, Equalities secretary Liz Truss, who has come under fire from the former LGBT advisers, promised prompt action. “We’re very committed to LGBT equality… and will shortly be bringing forward plans to ban conversion therapy, which is an abhorrent practice,” she told ITV.