@cocofyn Well, thanks for nothing. So, you're basically saying I get the speeds I get. There's no practical help in the two articles you referenced, apart from what I've already done. So, I've...

@cocofyn Some more info... this is in a 1990 residential property, with a single consumer unit and all electrical wiring was upgraded to current standards about two years ago. It was about 2 months...

I have just bought 2 x PG2400P KIT g.hn powerline adapters, to supplement my Deco XE75 Pro mesh network, to provide - I hoped - better Ethernet speeds for specific devices on my network, specifically...