After 70 years of centralized public services in the UK, stark differences between regions ("postcode lotteries") remain. These are typically seen as undesirable, but could instead foster experimentation and improvement. Historically, cities competed through local taxation and services, dramatically improving living standards. Postcode variation in policies like smoking bans could have allowed helpful trials of different approaches. Rather than futile attempts to impose identical standards nationwide, devolution could support regional differences that drive progress through competition.