@Mr_Flibble Well, The box states the tp-link I bought is an "AX 1800" in great big bold letters, so that's the driver I used from their website. Looking at the tiny label on the side it states...

The download speed shown at the router (TalkTalk) is 47 Mbps, my Ipads and Android phone are showing speeds of around 40 Mbps, but my PC is now around 12 Mbps This only started several days ago, it...