
In the UK same-sex couples can have their relationships legally recognised as a Civil Partnership which gives you the same legal rights as any married couple - see the government website here.
In order to form a civil partnership you must first give notice of your plans.
This involves letting a registration office know about your intention to register a civil partnership. Once you've done that, notices are publicised by the registration authority for a period of 15 days, similar to marriage notices.
A civil partnership can be formed in England and Wales at register offices or other approved locations. You can get a list of approved places from your local council.