Vodafone is the retail launch partner for Cityfibre's FTTH network, and are rolling out their "Gigafast" service in a number of cities. I believe they provide symmetric speeds from 100/100 to 900/900.
plusnet 80/20 (2/jun/14) at 470m - Sync history highest: 64/9 (Sep/17), 54/6 (Jan/19), 51/6 (Mar/19) 20 years of broadband from 1999's ntl:cable modem trial - Live BQM