Looks like interleaving may have perhaps been turned on earlier this morning as the stats are now reporting 'Corrected Blocks'. (aka FEC). I presume the 'Uncorrectable blocks' has stopped incrementing this morning?
If you examine the following page on your hub:
Settings, Diagnostics, DSL
Under Training History section.
It should list all previous disconnections, line speeds etc. Examine whether the protocol (mode column) has changed too overnight.
Look at the column labelled 'Mgn1' for the very last line entry (representing the line stats at the time you opened the page). This should give you the 'target' noise margin at the start of the current connection. What is the value? around 6.0 by any chance?
With a line attentuation of 48dB and 6db noise margin, a downstream line speeds of 4 to 7mb should be possible on a 'good' line.
The current 2006kbps downstream rate does seem unusually low unless your line is inherently 'Very Noisy', or it is still undergoing line training.
Your line appears to be configured for upto 12mb 'ADSL2' (G.DMT2 annex A) service, and I notice the upstream rate is higher than normal, currently 811kbps. It is usually around 445kbps.
Unless you specifically requested the higher upstream rate, I would speak to BT about getting it lowered. It may possibly help to raise the downstream speed but don't quote me.
Changing the protocol to the 'upto 8mb' 'ADSL1' (G.DMT annex A)service is another option but I can't see the downstream speeds increasing by a factor of 2 or 3 by doing so TBH, but it may improve stability.
