Spoke to Sky and the guy said he couldn't see any contention at the exchange.
I did a tracert to
www.bbc.co.uk:
Tracing route to
www.bbc.net.uk [212.58.246.92]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms ASUS-RT-AC87U [192.168.2.1]
2 <1 ms <1 ms <1 ms 192.168.1.1
3 3340 ms 2851 ms 3030 ms 97e7fe38.skybroadband.com [151.231.254.56]
4 11 ms 12 ms 12 ms 02780a30.bb.sky.com [2.120.10.48]
5 11 ms 10 ms 10 ms ntl-ge2-9.prt0.rbsov.bbc.co.uk [212.58.238.189]
6 * * * Request timed out.
7 12 ms 11 ms 11 ms ae0.er01.cwwtf.bbc.co.uk [132.185.254.93]
8 12 ms 11 ms 12 ms 132.185.255.165
9 12 ms 11 ms 11 ms bbc-vip013.cwwtf.bbc.co.uk [212.58.246.92]
Trace complete.
And having switched back to the SR102 can see these stats:
System Up Time: 29:55:41
Port Status TxPkts RxPkts Collision Pkts Tx b/s Rx b/s Up Time
WAN MER 18766630 36434122 0 52146 1167116 29:54:57
LAN Up 36032405 18654266 0 1589510 83364 29:55:41
WLAN Disable 0 0 0 0 0 00:00:00
Broadband Link Downstream Upstream
Connection Speed 67214 kbps 20000 kbps
Line Attenuation 14.6 dB 0.0 dB
Noise Margin 6.4 dB 9.9 dB
So now a bit lost as I checked the router and I am the only active connection!
plusnet Unlimited Fibre (FTTC) > Sky Fibre Pro Unlimited. 15ms Ping, Sync ~ 68.93/18.83Mbps