For British Citizens or individuals with settle status in the UK, there are provisions which allow them to bring their family to join them and live in the UK. Namely a family visa and family permits for EU citizens. Each visa/permit has different eligibility requirements, fee, and duration. I will provide links to the government guidance for both documents below, please note these are not exhaustive. Have good read to decide which documents, if any, is the most suitable based on your circumstance.

Family visa: https://www.gov.uk/uk-family-visa Family permit: https://www.gov.uk/family-permit