The Gay Liberation Front, a revolutionary gay pressure group formed in London in 1970, argued that the oppression of both women and homosexuals was a by-product of traditional gender roles.

Their argument was founded on the observation that the gender role of masculinity was closely associated historically with domination, oppression and violence.

The Gay Liberation Front manifesto went on to explain, 'The verbal attack on men and women who do not behave as they are supposed to, reflects the ideology of masculine superiority.

'A man who behaves like a woman is seen as losing something, and a woman who behaves like a man is put down for threatening men's environment or their privileges.'

The Remember 1967 series consists of six digital billboards created to mark the 50th anniversary of the Sexual Offences Act 1967.

With the passing of the Act, gay and bisexual men in England and Wales were able to have sexual relationships for the first time without being automatically criminalised.

Remember 1967 echoes demands made by activists in the 1960s that still warrant action today.