Another little bump to say thank you to ChrisD and everyone here. Found this post after some Ducking and Googling. My DS speed was lucky to get 52 Mbps, now up to a much better 63 Mbps (ish). However, I didn't opt to go for the full -50 delta as the FEC errors were going crazy (100,000s in matter of minutes) so used vdsl snr -30 instead to force a 3 dB SNR. Definitely an improvement and has been stable for days now.
Happy new year for 2019 everybody and hoping Openreach keeps rolling G.INP and/or "Ultrafast" as much as they can across the UK!
DrayTek Vigor 2860> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 62241000 bps US Actual Rate : 17599000 bps
DS Attainable Rate : 72481080 bps US Attainable Rate : 17825706 bps
DS Path Mode : Interleave US Path Mode : Fast
DS Interleave Depth : 907 US Interleave Depth : 1
NE Current Attenuation : 17 dB Cur SNR Margin : 3 dB
DS actual PSD : 6. 7 dB US actual PSD : 6. 9 dB
NE CRC Count : 164 FE CRC Count : 1425
NE ES Count : 30 FE ES Count : 811
Xdsl Reset Times : 0 Xdsl Link Times : 5
ITU Version[0] : 00000000 ITU Version[1] : 00000000
VDSL Firmware Version : 05-07-06-0D-01-07 [with Vectoring support]
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 20 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544eb206
DSLAM CHIPSET VENDOR : < IFTN >
DrayTek Vigor 2860> vdsl status more
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Near End Far End Note
Trellis : 1 1
Bitswap : 1 1
ReTxEnable : 0 0
VirtualNoise : 0 0
20BitSupport : 0 0
LatencyPath : 0 0
LOS : 0 0
LOF : 0 0
LPR : 0 0
LOM : 0 0
SosSuccess : 0 0
NCD : 0 0
LCD : 0 0
FECS : 541458 21835 (seconds)
ES : 30 811 (seconds)
SES : 0 30 (seconds)
LOSS : 0 140 (seconds)
UAS : 41 13711 (seconds)
HECError : 0 0
CRC : 164 1425
INP : 0 15 (symbols)
INTLVDelay : 0 800 (1/100 ms)
NFEC : 255 85
RFEC : 16 16
LSYMB : 4719 19259
INTLVBLOCK : 255 85
AELEM : 0 ----