hi all, an update and stats
I have a VM engineer visit yesterday, for a different issue (telephone cable needing connecting properly to the outside box), but I don't know if he'd been informed of my speed issue too, as he came in to look at my hub and fitted an isolator cable (should this have been there already?)
No problems with streaming last night although my speed I think is still a bit slow? Also the streaming issue does seem to be intermittant, I will have problems for a couple of weeks and then it will be perfect for a while and play up again a few weeks later - no particular pattern re days of the week.
https://www.thinkbroadband.com/broadband/monitoring/quality/share/aaf0ee526b04b42e6d3d64a12f97331b8c48786d
and a few speed tests I've done from the same site. These were carried out via wifi but in different locations, including right next to the hub, so its definately not an issue with range in my tiny flat. (ignore the two very slow ones, I forgot I was connected to my works' VPN at the time!)

last week, compared to just now:
https://www.thinkbroadband.com/_assets/speedtest/button/1643325425319372855.png
https://www.thinkbroadband.com/_assets/speedtest/button/1643365213371530055.png
. The green and yellow lines are definately closer since having the isolator fitted but still only averaging around 40mbp, when I am on the M200 service.