A cluster controlled trial using minimisation for allocation at the level of general practice in two centres (London and Nottingham/Derby), to compare a community-centre based group exercise programme - FaME [delivered by specifically trained postural stability instructors (PSIs) and supplemented by home exercise and prescriptive recommendations for walking], with a home based exercise programme and walking plan - OEP [supported by specifically trained and similarly aged mentors], with two years follow-up to determine the impact, acceptability and adherence to the programme, and longer term continuation of exercise. Control subjects will continue to receive usual care in primary care. A cost-effectiveness analysis will be conducted within the study.