The idea of the '15-minute neighbourhood' is very popular. But, Professor Paul Chatteron argues, it requires a fundamental shift in how we plan our towns and cities strategically, not just locally. Especially how we link neighbourhoods together and avoid the inequalities of 'gentrification' and car dominance. Covid has 'supercharged' the sustainability agenda, he thinks, and offers the opportunity to embed the 'net zero carbon' and socially-just placemaking principles we all now aspire to.