Here are the Sonos instructions…

https://support.sonos.com/en-us/article/connect-sonos-to-a-new-router-or-wi-fi-network

It’s basically, wire one Sonos product to the new router and connect the mobile controller device to the routers WiFi. Reboot the other (wireless) players/devices to ensure they all connect together.

When all show in the Sonos App, then goto ‘Settings/System/Network/Manage Networks’ and remove the old WiFi credentials by selecting them in the list (if no longer being used) and choose to ‘Update Networks’ … follow the onscreen instructions to then add the new CaSE sEnSitIVe WiFi credentials (SSID/Password) to the entire system/players.

Once completed, then uncable the wired Sonos device and wait 5-10 minutes for all devices to show up in the App and now running on the new wireless network signal. If it doesn’t work, you have likely incorrectly entered the new WiFi credentials, so make sure the details are entered with some care.

Hi Ken

Thank you for your reply.  I am now up and running!  Thank you for your help.