Hi @bigjognuk, thanks for getting in touch and I'm sorry to hear you've been having broadband performance issues as of recent. I've checked the connection this side and it looks like the signal strength for your line is set too low which explains when your devices seem connected but nothing loads up or you get buffering and this would certainly explain the packet loss you've seen as of recent.
The good news is it's a fairly easy fix and I have placed an order to up your signal strength which should complete in the next hour. If you then turn the router off and then on again in a hour or later the connection should be back to normal for you. Let us know how it goes.