> nothing like this in the UK.

It turns out there are several similar services offered in the UK by ISP's like O2, Sky, and BT¹ (recently rebranded as EE-WiFi²) who claim to be the UK's largest WiFi Hotspot Network. Perhaps that's due to it being opt-out on their routers since it was first introduced over a decade ago.

[¹]: https://info.btwifi.com/help/

[²]: https://ee-wifi.ee.co.uk/public/ee/index.htm