Thanks for your quick reply, RehabMan.
Yes, I expected some questions... I tried installing straight to the M.2 drive. That's when I noticed that when I reboot, I have a cursor on a black screen. I then thought I would install from a USB Clover installer to another USB stick on the same machine (UX305) so that I could take it out, stick it into a desktop Mac and see if the usual OS X stuff has actually gone on.
I did this and indeed the OS X folders and files appear on the USB stick. Please note that I'm just using the other USB stick as an 'internal' drive.
Since I can't see anything, there seems little point in trying to do anything on the UX305 past the actual installation.
The config.plist file I'm using, boots my Clover bootloader just fine.
What I did try was to install Clover on the USB drive that has the OS X installation (NOT installer) on it, the one I'm using as effectively, an internal drive. I did this connecting it to my desktop and running the Clover installer. I then copied the config.plist file from my bootloader (as it seems to work) and the kext files to the Clover part of the USB drive with the OS X installation.
Of course what I'd really like is to miss out this step and install straight on to the internal M.2 hard drive of the UX305.