We use Wifi, not Ethernet and, at an earlier stage the new box failed to connect with our hub. It's not impossible that was because I made a mistake putting in our password. However, I cannot get back to that stage to try to re-establish the connection.
You are right about C219 being a connection issue. That is clear from the error message on screen. 'There is a problem with the connection. There was a network error (C219).' However, this error message does not make it clear if it relates to the Wifi connection or the white cable connection to the Tivo box. I've spoken to someone at Virgin this morning this morning who suggests it a cable issue and we need a technician to sort it out - which puzzles me because the person I spoke to yesterday, at my suggestion, checked the signal going into the Tivo V6 box and declared that it was OK.
If anyone can suggest anything I can try between now and Monday when the engineer is due to call, I would be grateful because my wife and I are shielding and not at all keen having visitors to the house,