Thanks all for advice on this and apologies for delay in updates (pesky work getting in the way!!).

I spoke with support and they said that this is normal and happens and should return within a few days...well 3 weeks on and this has now happened and it looks like my line has gone back to fastpath. Will confirm stats when I get home so others with similar lines can use them for comparison.

http://www.thinkbroadband.com/ping/share/80c85547b25...

Cheers and beers..

Stats as now...

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 27786 Kbps, Downstream rate = 80972 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 79987 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.4 15.3
Attn(dB): 10.1 0.0
Pwr(dBm): 13.8 -5.6
VDSL2 framing
Bearer 0
MSGc: 18 26
B: 239 237
M: 1 1
T: 23 42
R: 0 16
S: 0.0955 0.3781
L: 20104 5374
D: 1 1
I: 240 127
N: 240 254
Counters
Bearer 0
OHF: 24976590 1953440
OHFErr: 11 41
RS: 0 3155335
RSCorr: 0 353
RSUnCorr: 0 0

Bearer 0
HEC: 4 0
OCD: 0 0
LCD: 0 0
Total Cells: 2056176184 0
Data Cells: 573861 0
Drop Cells: 0
Bit Errors: 0 0

ES: 22 759
SES: 11 10
UAS: 335 324
AS: 41308

Bearer 0
INP: 0.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 1.65 3.98
OR: 116.09 64.22
AgR: 80103.09 20063.54

Bitswap: 13710/13710 16/16

Total time = 1 days 23 hours 31 min 54 sec
FEC: 0 353
CRC: 611 41
ES: 22 759
SES: 11 10
UAS: 335 324
LOS: 1 0
LOF: 9 0
LOM: 0 0
Latest 15 minutes time = 1 min 54 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 25
CRC: 2 3
ES: 2 2
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 23 hours 31 min 54 sec
FEC: 0 353
CRC: 611 41
ES: 22 77
SES: 11 0
UAS: 308 297
LOS: 1 0
LOF: 9 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 70
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 11 hours 28 min 27 sec
FEC: 0 353
CRC: 11 41
ES: 11 33
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
#

Whilst your latency has dropped, so has your max aattainable sync (from 84>81 mb/s). More worryingly you seem to be getting regular packet loss (red spikes) as well on your BQM.

As a comparison, i'm slightly further away from the FTTC cab than you are (ds attenuation 12db v 10db) yet our sync & max rates are almost the same.

# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 29799 Kbps, Downstream rate = 80952 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 80000 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.4 15.1
Attn(dB): 12.6 0.0
Pwr(dBm): 12.7 0.4
VDSL2 framing
Bearer 0
MSGc: -6 26
B: 203 237
M: 1 1
T: 0 42
R: 10 16
S: 0.0809 0.3781
L: 21153 5374
D: 8 1
I: 214 127
N: 214 254
Q: 8 0
V: 5 0
RxQueue: 78 0
TxQueue: 26 0
G.INP Framing: 18 0
G.INP lookback: 26 0
RRC bits: 0 24
Bearer 1
MSGc: 186 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 5.3333 0.0000
L: 48 0
D: 3 0
I: 32 0
N: 32 0
Q: 0 0
V: 0 0
RxQueue: 0 0
TxQueue: 0 0
G.INP Framing: 0 0
G.INP lookback: 0 0
RRC bits: 0 0
Counters
Bearer 0
OHF: 0 1898505
OHFErr: 0 215
RS: 1692169552 1721482
RSCorr: 22686 2719
RSUnCorr: 0 0
Bearer 1
OHF: 13002770 0
OHFErr: 0 0
RS: 156032498 0
RSCorr: 0 0
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 140012 0

You've totally lost G.INP, and now show no DLM intervention of any kind.

Has someone reset your line?

Nonetheless, this change shouldn't explain a reduction in latency.

As far as I am aware there has been no intervention on the line by my ISP or BT. The only thing is the automated DLM dropping the interleaving and turning off G.INP. My BQM now looks like it has for the last few years....I have no idea what went on....why or how

My attainable used to be well over 100Mbps but has dropped over the years...I suspect as others have taken up FTTC, I was the 2nd person on the cab a few days after it went live.

As for my BQM the large spike at 5:30 on Friday morning was the DLM intervention and I've not really seen any real packet loss.

I will need to turn the power off to do some electrical work so will see what the stats are like after a daytime reboot....but will wait for the snow to stop first