Start by agreeing a realistic budget, guest list and preferred date, then research venues, suppliers and wedding insurance. Check the legal requirements for your part of the UK: you will usually need to give notice through a register office and provide documents such as identification, proof of address and immigration details where relevant. Confirm that your venue or ceremony arrangements are legally authorised, as rules differ between England and Wales, Scotland and Northern Ireland. Before the wedding, arrange name and address updates, review financial arrangements and consider making a new will, because marriage can affect an existing one. Check GOV.UK or your local registration service for current requirements.