I think the network is starting to creak, hence the changes to Plusnet today. I wonder if BT TV will be able to cope with demand.
From
a BT Help page:-
The actual speeds you will experience will differ and will continually vary throughout the day as levels of congestion on the internet change. You should not expect full speeds all the time, especially during the daily peak period (5pm - 12 midnight) when global internet speeds are at their slowest due to congestion.
....
The main factors governing the day-to-day download speed you will experience over your line are:
�the time of day. In other words, how busy BT's network and the internet are (6-9pm being the busiest time, when speed can reduce significantly)
...
....
We are seeing several BT Wholesale ISPs experiencing frequent congestion, often geographically based, Plusnet as you mention, Zen, even AAISP, that appear to be down to the BT Wholesale network.
I think the planners must have grossly underestimated the effect of the transition away from normal TV to streaming online. Alongside the other rapidly growing stream services.
Plus we have the higher volume of higher and higher definition phone-cam pictures going up into the many cloud repositories now that FTTC upstream and mobile 3G and 4G speeds are available. Mobile uploads will only affect whatever networks the mobile companies have, but once photos and videos are on the likes of Dropbox they typically are immediately downloaded to a lot of landline computers.