It's a familiar scene: a soldier returns home from war and proposes to his partner. Except this one's a little different...

This video from the UK's Coalition for Equal Marriage was made with actors, but it speaks to a firm reality: across the world, millions of gay couples are not equal before the law. Even in relatively liberal Britain, the rules are still bizarre and unequal. Gay couples can have "civil partnerships", which confer many of the same rights as being married but are not viewed as marriages under the law. Meanwhile, heterosexual couples are not allowed to have civil partnerships.

It's a simple argument: if gay people can serve their country, why won't that country recognise their right to marry the person they love?

Take action: The UK government launched a 12-week public consultation on gay marriage in March. Join the call for universal equal rights.