What Percentage Of The UK Population Is Gay Or Bisexual?

It's hard question to answer because people are inclined to lie, and people may experiment but change their minds.

In the 1999-2001 National Survey of Sexual Attitudes and Lifestyles, about 8% of British men and 10% of women reported at least one life experience of same-sex contact, but only 2.6% of either gender have had a same-sex partner in the last 5 years.  It seems reasonably to suppose that the actual number of people who could accurately be described as non-heterosexual, in terms of long-term lifestyle habits, is between the 2.6% and about 9% figures.

In 2005 the Dept. Of Trade and Industry, trying to assess the impact of the New Civil Partnership Act, and reviewing various surveys, produced an estimate that 6% of the general population could reliably be identified as gay.   

6% is probably a pretty representative figure internationally, see more estimates for other countries here:
en.wikipedia.org/wiki/Demographics_of_sexual_orientation

My view is that everybody is born bisexual to some degree!

Most people choose their most dominant desire side, some deny their most dominant side, even to themselves!

Some, for social and/or family reasons, try to go with the least dominant side but end up having to admit reality!

Everybody is, and should be treated as socially equal, whatever their gender or sexual orientation, only an individual can decide the strength of their feelings for any desire side!

Almost three-quarters of a million UK adults say they are gay, lesbian or bisexual - equivalent to 1.5% of the population, a survey suggests.
The Office for National Statistics (ONS) says 480,000 (1%) consider themselves gay or lesbian, and 245,000 (0.5%) bisexual.
The ONS received 450,000 responses in its new Integrated Household Survey.
The survey provides the biggest pool of social data in the UK after the Census, ONS says.
London had the highest percentage of those polled who identified as gay, Lesbian or bisexual and Northern Ireland lowest.

If you believe the gay hype then everybody is gay. Can't go anywhere these days without being gay bashed for not conforming to the homosexual way of life. The gay community was estimated by the government in 2005 to only be 6% of the population (160 out of 100 people, 160 out of  1000, 16,000 out of 100,000 people etc). Yet somehow it feels like the reverse to the point where one can't tell the difference between gay people and jehovahs witnesses. We don't all want to be gay, we don't all want to conform with norms that we don't all agree with. I don't mind gay people but I'm getting fed up of being gay bashed - I have a human right to live by my own world view whether it agrees or disagree with other peoples. Right now the way I feel towards the gay community is the same way I feel towards footballers who feign injury - attention seeking, headline grabbing, want to be the centre of attention etc. Why can't gay folks be content with the freedoms they already enjoy? And as for those that compare the gay plight to slavery...thats just a full blown insult, like a stroppy kid invoking the holocaust as equivalent to being grounded for a couple of nights! Come on folks, let's just all stop trying to turn the world into our colours. Live and let live remember?

3%

I think the percentage is about 95%. Ive heard a lot of stories about the UK.

I'm with Britnude on this one: I think 100% of the population is bisexual. How many would be prepared to admit it, though, now that's another story.