London's broadband scene is changing fast. Full-fibre is finally reaching most of the city, and alt-nets like Community Fibre and Hyperoptic are giving BT and Virgin Media real competition. Your experience still depends heavily on your postcode, though.
full-fibre FTTP is expanding, and they still offer FTTC where fibre hasn't landed yet.
cable covering most of Greater London, speeds up to 1.1 Gbps.
a London-only provider with symmetric gigabit at surprisingly low prices.
full-fibre in newer blocks, especially strong in Zones 1 to 3.
FTTC (fibre-to-the-cabinet) tops out at 80 Mbps download. Many London homes are still on this if FTTP hasn't reached their street.
Virgin Media cable congestion in dense housing estates during evening peak, similar to US cable node issues.
Victorian-era internal wiring. Older properties with long telephone extension leads lose speed before the signal reaches the router.
WiFi interference in terraced houses and flats where dozens of networks compete on the same channels.
Look up your postcode on the Openreach checker and check Community Fibre too. Getting full fibre changes everything.