This briefing paper provides information for family carers who are supporting a teenager or young adult with severe learning disabilities and behaviour described as challenging, who is approaching transition to adult services. It aims to help carers understand what expect from local services, to help identify what 'good' services look like, to help them ask for the support they and their family need and to help them work in partnership with the professionals. Short sections cover: what is 'challenging behaviour'; your rights; support with challenging behaviour; what good support looks like; working with professionals; planning ahead; choosing where to live in adulthood. Organisations that can provide further information and advice are listed at the end of the briefing.