Had talks with Plusnet end of last year. 57 Mbps to laptop via ethernet cable (nailed on consistent) but WiFi at 10 feet through a wall dropped to 20/22 and stalled Zoom. (Plusnet router 5 years old - Plusnet recon should be good for 6-8 years.)
So installed cable.
Recently Wifi speed up to 46 Mbps at 12 feet through wall and similar 28 feet away through 2 walls - steady now for a few weeks. Don't understand why this has gone up.
My phone recorded 226 Mbps today! Usually around 120 Mbps
(All tests using bt wholesale speed test)
Plusnet give 55-75 Mbps expected for our house - on FTTC I assume - definitely not FTTP - Unlimited fibre extra contract