https://www.solwaycomms.com/why-uk-lagging-broadband/
(Courtesy of Solway Connections)
This might give an idea of what's going on. I've just had my fibre optic supplier upgrade to the 'extra' service which should give me up to 70mbs, but guess what it doesn't. During the evening it drops to around 9-15mbs and there is nothing anyone can do about it. 4K streaming is impossible. I've had a BT engineer in who changed the box on the wall, however he did say that with a copper wire connection no one will ever get a good fibre optic speed. New build houses have such a cable connected, but I can't see BT digging up our Close to relay cable anytime soon. He also stated that living at the end of the road the signal drops yet again. Funny it seems Romania has normal speeds of 300mbs. No wonder we are so far behind in technology.