https://www.theregister.co.uk/2019/04/15/asa_cityfibre_fibre_broadband_judicial_review/

Broadband infrastructure slinger Cityfibre has lost a judicial review against the Advertising Standards Authority after the regulator decided that the term "fibre broadband" could include connections that used a mix of fibre and copper cables.

Handing down his judgment today, Mr Justice Murray accepted that "full-fibre infrastructure is technically superior to part-fibre technology", but added that the ASA was right to say average consumers don't understand that. Thus, he ruled that it's OK to advertise connections relying on a mix of fibre and copper as "fibre broadband".