I finally gave up on the powerline adapters after getting buffering on 2160p HDR content. I'm in a rented flat, so I had to (carefully) run ethernet cable under the carpet. So
TP-LINK TL-WPA4220T KIT 300Mbps AV600 Wireless N Powerline Adapter Triple Kit - Laptops Direct
What Is Powerline Networking and How Do You Use It? | Digital Trends
Tp-Link Powerline Network Adapter Deals - Laptops Direct