Yes, that is exactly what I have - long cable from hub to mini router, short cable from mini router to youview box.
Your solutiion with the TP-Link SG105 seems ideal, thanks for your help, you have been very patient with me!
Just to try & confirm that if the long cable goes directly into the Youview box BT Sport works. Yes is the answer we need.
Yes, BT sport definitely works with long cable directly into youview box
Then you should be good to go.
Thanks again for the help