Background: People with intellectual disabilities and behaviours that challenge others are living longer. This review aimed to explore what is known about the health and social care needs, experiences, service interventions and resources of and for this population as they transition to different care contexts in the UK.Method: A rapid scoping review of published and unpublished literature was conducted based on collaborative working with key stakeholders and using systematic methods of data searching, extraction and analysis.Results: Consistent social work support, skilled staff, suitable accommodation, creative engagement with individuals and families to plan ahead, and timely access to quality healthcare are all required to promote successful transitions as people age, and to avoid unwanted/inappropriate transitions at points of crisis.Conclusions: More research is needed to assess the types of services that this population can and do access as they age, the quality of those services, and the extent to which local commissioners are planning ahead for people with intellectual disabilities and behaviours that challenge others. K E Y W O R D S ageing, behaviours that challenge others, intellectual disabilities, older people, transitions 1 | INTRODUCTION 1.1 | Background and rationale Over 1 million adults with intellectual disabilities live in the United Kingdom (UK), representing over 2% of the total adult population (Mencap, 2021). In line with an overall UK ageing population (Office of National Statistics (ONS), 2021) people with intellectual disabilities are living longer. In England, an estimated 53% of the total population of people with intellectual disabilities were aged 45+ in 2020 (with almost 5% aged 85+), predicted to rise to 56% by 2040 (and 7.5% aged 85+) (Institute of Public Care (IPC), 2020).Increased longevity is heavily implicated in the predicted rise of 30% in people with intellectual disabilities aged 50+ requiring social care services in England over the period -2030(Emerson et al., 2012. In Wales, in 2020/21, 9% of all people with intellectual disabilities registered (1231 people) were aged 65+, an increase of 54% from 2001/02, with 18% of people aged 65+ (222 people) living with their parents or other family members (StatsWales, 2022).Data from the 2011 census showed that 37% of people with intellectual disabilities in Scotland were aged 45+ (9619 people), with 3% aged 75+ (Scottish Learning Disabilities Observatory, n.d.). The 2011 census also reported that 24% of people in Northern Ireland with intellectual disabilities were aged 45+ (9049 people), with 8%