"Coalition for Equal Marriage", who lobby in favour of gay marriage, have stepped up their campaign with a new video.
The video shows a male soldier returning from service, who is met by his male partner. As the two are reunited the soldier gets down on one knee and proposes. The video ends with the tag lines "All men can be heroes", "All men can be husbands", "End marriage discrimination".
The new video comes as poll results suggest that the majority of people in the UK are in favour of equal marriage. Even senior members of the Anglican clergy have said that the "Church should rejoice" and celebrate moves to extend marriage to same-sex couples.
Although marriage laws vary in the countries of the UK, they all prohibit marriages between same-sex couples. Since 2005, same-sex couples are allowed to enter into civil partnerships, a separate union which provides the legal consequences of marriage, but a traditional marriage available to heterosexual couples remains prohibited.
In September 2011, the Government announced its intention to introduce same-sex civil marriage by the next general election. The Liberal Democrats especially champion the legalisation of equal marriage, however campaigners are still faced with opposition.