This At a glance briefing explains the importance of tackling social isolation and loneliness, particularly among older people. It highlights the adverse effects of feeling isolated and describes a number of services that have been found to help reduce the problem. The briefing is based on SCIE’s review of research evidence, published in Research briefing 39: preventing loneliness and social isolation: interventions and outcomes. (1) However, in addition to the research evidence, this At a glance also includes case study examples of two services provided in the UK to help mitigate loneliness and isolation and improve the wellbeing of older people. Briefing published by Social Care Institute for Excellence (SCIE) in May 2012. Review date is May 2015.