Applying for British citizenship by marriage requires meeting key criteria, including residing in the UK for at least three years, holding Indefinite Leave to Remain (ILR) or Settled Status, and proving English language proficiency. The application process involves submitting Form AN, providing supporting documents, and attending a Life in the UK test. Processing takes around six months. https://ayjsolicitors.com/how-can-i-gain-british-citizenship-by-marriage/