Ah ok, you tried it in the loft?Thanks MrDave
Tried your suggestion with no joy. Speedtest still showing around 3Mbps download.
Interestingly, upload speed over 20 and totally wasted on me.
Thank you for the suggestion. I've ordered a pair of TP link Injectors/splitters and then it's back to attaching my router to the broom handle and testing!You could use Power over Ethernet (PoE) that's how we power ours in my wife's shop. you then only need one cable running into your lost.