Thanks David, I am looking forward to many of the new enhancement (including the new MQTT 2) after I have stabilised the base capabilities that my family enjoy.
For others reading this thread the missing piece for me was the need to go into PaperUI then Configuration > System goto ‘Add-On Management’ section and enable ‘Include Legacy 1.x Bindings’ option, don’t forget to say the change.
Then wander down to Add-Ons > Bindings tab and you should now see a MQTT Binding 1.x (1.13.0) version as well as the new MQTT Binding 2.4.0
Installing the old MQTT 1.x binding enables the old MQTT mode of operation prior to the upgrade to 2.4 in my case using an external mosquito server.
On to the next upgrade issue and I will hopefully get this upgrade stable so I can PLAY.
Thanks
Paul