I've been having issues with speedtests not going over 15Mbps for the past week even though the modem was connected at 40Mbps and BTw checker showed IP profile of 38Mbps. Spoke to Plusnet net and apparently it was related to me moving to this new network. What was odd was the tracert's I've been doing the over the past few days suggested I was still on old network. They made a change today and line reconnected. Speedtest results back to normal and trace now indicates I'm on new network.
Tracing route to ntp.plus.net [212.159.6.9]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms
www.routerlogin.com [192.168.1.254]
2 25 ms 26 ms 25 ms 195.166.130.210
3 26 ms 26 ms 26 ms link1-central10.pcl-ag06.plus.net [84.93.249.161]
4 28 ms 26 ms 26 ms po2.pcl-gw01.plus.net [195.166.129.41]
5 30 ms 29 ms 26 ms cdns01.plus.net [212.159.6.9]