The 15-minute city concept, proposed by Professor Carlos Moreno in 2016, aims to make urban environments greener and more liveable by having all shopping, leisure, healthcare, and transport facilities within a quarter of an hour's walk or bike ride from home. Local authorities have become more interested in urban centers than out-of-town developments, with councils in Birmingham, Oxford, Sheffield, and Waltham Forest exploring the potential of the 15-minute city. Retailers should note this trend and consider how to maintain local centers with a good spread of facilities, including shopping, public transport, health, and leisure.