Although the initial reply given by Paul did not work, he kindly offered to ring me or for me to ring him with my problem.
I rang him and he talked me through various checks.
With his help and a great deal of patients and time on his part, it transpired that it was a faulty Ethernet cable connected to the Virgin box.
This was removed and the box was re -connected via Wi-Fi.
He is a credit to Virgin Media especially as he is in self isolation and working from home.
Thank you again Paul.