Engineer was not here long at all. Seems it's the same problem I had early last year - a network problem creating instability, so my speed has been cut down further and further by Openreach to make it more stable.
Hopefully she can get it sorted now. This is the third time since I moved here that there's been a fault on the line, I'm not impressed (that's Openreach's issue, of course, nothing to do with my provider).
@RolloTreadway Glad that's on the way to being sorted (again). Amazing the effort they have put in to NOT sending a human out, but they sort it out in minutes when they give in and send one.
@scribblans Next time it happens, I shall tell them 'this has happened twice already, can you check it's not happening again before you start doing anything else?'