Thank you StephC74
I tried your suggestion about 4-5 hours ago, and so far it is looking positive, not had anything reset itself or boot me out yet.
I can't pretend I understand why or how it works, but it does appear to have worked for me, the morning will confirm or otherwise
"Restart iPad using the top button and either of the volume buttons. Slide to power off and then wait 30 seconds before powering on.
Toggle your iCloud settings. Settings, tap your name, icloud
Temporarily disable iCloud drive and iCloud keychain
Restart your device and then re-enable iCloud Drive and iCloud Keychain.
All credit to simply Mac "