Openreach - the main broadband network provider - says it plans to ‘retire’ its old copper network (which supports ADSL) when they’ve finished their Full Fibre rollout.
From December 2026, it's expected that ADSL connections will become unavailable UK-wide (except for in very specific and limited circumstances). At this point, it's hoped that gigabit-capable broadband will be available to more than 85% of the country.