More young people are identifying themselves as bisexual compared to gay or lesbian for the first time, figures have shown.

Among 16 to 24-year-olds, 1.8 per cent said they were bisexual, while 1.5 per cent said they were gay or lesbian, sexual identity data from the Office of National Statistics (ONS) found.

It is the first time there have been more bisexuals than homosexuals in any age group and the data provides further indications that with each generation, people appear to see their sexuality as more fluid and less set in stone.

In three years the number of British people defining themselves as bisexual has risen by 45 per cent, with the 2015 ONS Annual Population Survey (APS) estimating that 334,000 people in the UK openly identify as bisexual, compared to 230,000 in 2012.

A rise in the number of LGB figures in the public eyes has been partly credited for the rise, with people such as Miley Cyrus, Kristen Stewart and Cara Delevingne being open about being attracted to both men and women.

The figures reveal a considerable divide between younger and older generations concerning sexual identity. While 3.3 per cent of 16 to 24-year-olds said they were LGB, for the over 65s the figure was 0.6 per cent.

The figures refer only to sexual identity and do not cover gender identity or necessarily reflect sexual attraction or behaviour.

Last year, a survey released by YouGov found half of young British people defined themselves as not 100 per cent heterosexual.

When asked to plot themselves on a scale of sexuality, ranging from exclusively heterosexual to exclusively gay, 72 per cent of adults and 49 per cent of people aged 18 to 24 chose a position other than completely straight.

Overall, more males (2 per cent) identified as LGB than females (1.5 per cent) in the recent ONS survey.

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Some 0.4 per cent of the total identified as "other" while a larger group of 4.1 per cent either refused or did not know how to identify themselves.

More than two-thirds of the LGB population were "single, never married or civil partnered," the ONS said. This is potentially due to the young age of LGB people compared with the population as a whole and the fact that same-sex legal unions are relatively recent.

Overall however, the percentage of LGB people in the UK is relatively small with 1.7 per cent of the population identifying as lesbian, gay or bisexual according to the data.

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A Stonewall spokesperson said: ‘'It’s great to see that more are comfortable coming out or identifying as lesbian, gay or bi than ever before. The spike in individuals identifying as bi could be due to more exposure of bi role models in the media, and opening up discussions around issues such as bi-erasure and biphobia. We would hope that individuals who had previously felt pressured to conceal their bi identity now feel safer and more empowered to be open about how they identify.

"It’s a shame the data doesn’t account for those who identify outside of the binaries of lesbian, gay and bi, however. We know that many LGBT people prefer not to label their sexual orientation in such a way, and so their input in this research is lost.

"Regardless of the fact that people feel more comfortable identifying as LGB, there’s still so much work left to do until all LGBT people are able to live openly and freely. And until that time comes, Stonewall continues to work towards a world where all LGBT, everywhere, are accepted without exception."