Under the Sexual Offences Act 1967 (as amended by the Sexual Offences (Amendment) Act 2000) homosexual acts are not illegal as long as both parties consent , both have reached the age of 16 AND the acts take place in private. Homosexual acts are defined in law as 'buggery' or 'gross indecency'.

An act is not done in private if more than two people are present or the act takes place in a lavatory which the public have or are permitted to have access.

This means technically as the law now stands gay sex in a public or semi-public place such as a toilet, park, beach or even a gay sauna is illegal.

Group gay sex/orgies at private clubs or parties are illegal. There is no equivalent law regulating the private sexual conduct of lesbians or heterosexuals.

However, in the European Court of Human Rights case ADT v The United Kingdom 2000 it was held that UK had violated the Applicants rights to privacy contrary to Article 8 of the European Convention on Human Rights. In this case ADT was charged with Gross Indecency following a search of his house where video tapes were found with footage of him and up to four others having sex at his home.

Following this ruking the UK is now required to change the law. The Home Secretary in June 2002 announced that the Sexual Offences Act would be amended in the next session of Parliament. Note that the ruling only effects sexual conduct in private or semi private places.
one wrong law down loads more to go