Living in London does not create separate Child Benefit rules: eligibility is generally based on being responsible for a child under 16, or under 20 if they remain in approved education or training. Usually, only one person can claim for each child, and the child normally needs to live with you or you must contribute towards their support. If you or your partner has higher income, the High Income Child Benefit Charge may reduce or recover some of the payment. Check the latest guidance on GOV.UK for income thresholds and application details.