[Joe Blow]

Update: I purchased the TP-Link 1200 Mbps Gigabit Passthrough Powerline Starter Kit from amazon, cost around £50. You get 2 plugs including 2 cat6 patch cables. I've tried a couple of races and can confirm a stable connection in both races. Ping time is a lot less too, so most enjoyable!
Thanks for the advice guys, hope this experience helps anyone else with maintaining a good stable connection.