Thanks for your helpful advice on this.

@Lordwanswell Thanks again. Yes the public IP address is the same as my PC IP address, so conclude my router is in bridge mode. With my Linksys Velop hub wired immediately downstram of the router,...

@Lordwanswell Thanks, have checked it but it means nothing to me. What is a public IP address?

Thanks for this, it sounds reasonable, although I have not checked the IP address yet. Sunds like I was given poor advice by Gigaclear; I needed a router not an unmanaged switch.

I have bought this switch as there is only one port on my Gigaclear fibre modem. I have connected that port to one port on the switch and my Linksys wireless node and my PC to the other ports, all...