The one wired device l tried before was borrowed from work. The other is my pc but that is now back upstairs on gigabit home adapters.l haven't got the time to directly wire that up again as it took ages last time as it's a full desktop pc with monitor.
Something strange is happening but l do not know what. I get exellent speed over WiFi just not the Ethernet but the speed is still good.. l do find it strange as they are gigabit plugs and cat 6 cable.
I think l will just invest in a decent WiFi adapter for the pc as I'm at a loss .
Thanks for all you help anyway as the system is definitely working much better than before.