Nest officially entered the UK market last year with the launch of its smoke and carbon monoxide detector Protect, but curiously, the Learning Thermostat the company's known for remained exclusive to North America. That changes today, however, with immediate availability of the clever thermostat across the UK. The now Google-owned Nest actually starting working towards the launch over a year ago, but unlike the US and Canada where temperature control systems are fairly standardized and digital thermostats extremely common, Brits have an eclectic mix of boiler setups, and analog/digital thermostats. Making the Learning Thermostat compatible with all these arrangements meant Nest had to conjure up some additional hardware in the form of Heat Link: a box that jacks directly into your boiler and takes orders from the thermostat. You can use existing wall wiring to directly connect the two, but they can just as easily communicate over WiFi all the same.