Advice on how to apply for British citizenship. British citizenship - Naturalisation The rules and processes for becoming a British citizen are slightly different for adults and children. Find out information about naturalising as a UK citizen for those aged 18 and above. British citizenship - Registration The rules and processes for becoming a British citizen are slightly different for adults and children. Find out how to apply for the registration of children under 18 as British nationals. Life in the UK and English language Information on the requirements you must meet when applying for settlement (known as Indefinite Leave to Remain), or British citizenship. This article was published on 2024-06-24