alt Hacker NewsOkay so that's no excuse for whoever is providing your internet, coax can deliver 800+ Mbps no problem. And if you are actually saying you only get DSL through a phone line in London then holy shit I would be busting down the door of my landlord. They never in the last half a century got wired for cable?!
A phone line from before WWII works fine to make a call but absolutely sucks for DSL.
And in London many buildings are declared as historic making it hard to get a permit for any work. The best chance is to wait until old pipes bursts and digging has to be done in any case to put fiber along the pipes.