In 2004 she voted in favour of civil partnerships.
In 2013 May voted in favour of same sex marriage.
In 2014 May voted in favour of allowing courts to deal with same sex divorce and annulments.
In 2014 May voted to make same sex marriage available to members of the armed forces outside of the UK.
As Equalities Minister, May was also responsible for helping to draft the same sex marriage legislation with her junior minister Lynne Featherstone.
*Correction: 10.07.2017: This article stated that the SDLP in Northern Ireland has the same stance on LGBT rights as the DUP. This was incorrect and the copy has been amended to reflect that. In 2017 The leader of the SDLP Colum Eastwood called 'equal marriage the civil rights fight of today'.