It's taken a while, but finally Google Home speakers in the UK can be used to make hands-free voice calls. The feature was announced at Google I/O 2017 and introduced in the US last August. Brits have waited patiently since then (
or switched to Alexa, which has offered voice calls since October) for the same functionality — today, that mental fortitude pays off. To get started, simply say "Ok Google" or "Hey Google" followed by the person or business you'd like to call. You don't need your phone either — the speaker will use Google Contacts as an address book and place the call over Wi-Fi.
Update: As one of our readers pointed out -- Alexa-based calls only work between Echo devices (or a smartphone with the Alexa app installed). Google's implementation is, therefore, different and drastically more useful.