Very slow wifi with deco p9
Setup: Virgin 200M modem ---> Deco P9 (main mesh router) ---> 1Gb switch
Two further P9s around house
Connecting Windows Laptop, or Chromebook via ethernet to switch gives Download speed of 182 Mbps, Upload of 20.53 Mbps.
Connecting same via WiFi gives Download speed of 20.99 Mbps, Upload of 21.67 Mbps.
Clearly, signal from Virgin is good. I've been through all the checks suggested elsewhere, but can't get the wifi signal to improve