Blimey, that's almost Gigabit FTTP territory.
Mind you, I'd be happy with the 500Mbit average I get, if it was reliable. Its fine for downloads generally, but both Vodafone 4G and Three 5G will periodically have issues booting off my AAISP L2TP tunnel which restarts the whole firewall causing connectivity to drop.
Currently paying £16/month on contract but its going up in April. Its kinda insane that long-term contracts directly with the network get price rises while rolling monthly contracts with their resellers generally don't.