Nuki vs Yale vs Ultion: Which Smart Lock Is Best for UK Homes in 2026?

Choosing a smart lock for a UK home is more complex than it looks — cylinder compatibility, uPVC door support, and smart home integration all vary significantly between brands. This in-depth comparison of Nuki, Yale, and Ultion smart locks covers pricing, features, security credentials, and which model suits renters, homeowners, and security-conscious buyers in 2026.