Good news, I have now finally managed to install under Ubuntu. Couldn't find ADB or Fastboot in the app store, but when I tried to call them from within a terminal (to see if Ubuntu was detecting the phone), it very helpfully gave me the commands to install them. Once they were both installed, I ran the Ubports installer again, it still didn't auto detect, but under manual select, it ran to completion, I now have Ubuntu Touch on my Nexus 5
Many thanks for your help

I have a duel boot machine which I have tried, but know about universe repository, will try that when I get home after Christmas and report back.
Thanks again
Seasons Greetings

Nah, same result. Many thanks for your time, but I've taken too much up of it, especially so near to Christmas. Maybe someone in the UK would be prepared to flash it for me, for a "consideration"?

where would they be? Do you mean the recovery logs UBports recovery?

Nope, same thing, goes through fastboot stage quite quickly (after manual selection, never auto detects), reboots into UBports recovery, but installer doesn't see it. Are files available to flash with fastboot, or is it o different to android that that won't work?

ok, thanks, i'll give it a go and get back to you

Always run installer as admin. Fastboot and ADB installed globally, but have also tried putting the path in.

Installer version 0.1.21-beta

Thanks for your reply. Mostly Win10 64, but also Win7 64 and Ubuntu something or other. Yes, have tried unplugging and replugging, still no joy, shame as I'm really looking forward to trying it, so fed up with Googley andwoid. Loved WebOS, it got killed, BlackBerry 10 was decent, it got killed, SailfishOS shows promise, but need to have android apps support, so not ideal; please, someone, spare us all from android

If I can jump in here. I too am having problems with the installer on an N5. After much buggering about, I managed to get it to do the fastboot part, but when it reboots into UBports revovery, the installer fails to detect it. I have run "adb devices" at this point and it is quickly detected and that it is in recovery mode. I wonder if the installer is putting the "./" in the adb commands?
I have used three different PCs and installed Ubuntu on one, also several different cables, all to no avail. I fear the installer is the problem.