@stephenw10 Thank you for the reply and the pointer to the images. That is the area where I downloaded the images that worked.
I don't have any logs as it didn't fail in the normal way. What happened is that it was almost like reflection was turned off with just no responses and the Package section just said unable to retrieve package.
I'm leaning towards 'It must be me' Nobody else seems to have hit this issue and yet there is little that I could have done wrong.
Originally a perfectly working system. I made a mistake and screwed it up because I was stupid and didn't follow my own rules. Lost the backups but as I document everything I had every setting that was needed as well as some config backups. Just a lot of typing.
Copied Installer from site, wrote to USB drive. Booted. Following instructions as per normal. Connects to your site, as I'm using my CE version it sees I don't have a plus account and offers CE. Finishes and I reboot and configure the system again. Works OK but no incoming connections allowed which is the default which I change to PureNAT for my system. I then set up my DNS and DHCP entries, my firewall links etc. and at some stage during the config changes the external access fails and the Package Manager fails to update. Sometime it is quick and other times after I have restored it all. I originally used the backups, then selecting DNS etc. from the backups. At some stage it just stops.
Installing from the base images it works fine. I installed 2.7.2 from that link you provided and have rebuilt it completely and it is fine.
It makes no sense. However, I don't want to waste your time so I'm going to leave it as it is as I am now behind on some work I need to do. Let's put it down to user error and let's see what happens at the next upgrade.
Thanks for your help.