The number of British people defining themselves as “bisexual” has jumped by 45 percent in just three years, according new official estimates. For the first time, more young people in the UK describe themselves as bisexual than gay or lesbian combined, the figures from the Office for National Statistics show.

It is the latest evidence pointing to a shift in attitudes towards sexuality, with increasing numbers viewing their own position as somewhere on a spectrum rather than it being a black-or-white question. A survey by YouGov published last year found that half of young people, and almost a quarter of the population overall, define themselves as something other than 100 per cent heterosexual. READ MORE