After a lot of effort and assistance from you guys, I am able to connect to my PXFmini with RPi0 W via my home network. I have set everything up with mission planner and flown successfully a couple of times.
I now need to connect away from my house and use droidplanner on my phone to make PID changes etc.
The only problem is it's that it took that long and that many changes, I can't remember how to setup my Rpi0 W as a hotspot. It was setup as a hotspot at one time, but there were issues because of hostapd running conflicting with my attempts at connecting to my home wifi.
I remember that the thing that got me connecting to my home wifi was disabling hostapd, then I got a solid connection. However just enabling hostapd again won't create a hotspot that I can see.
I know I've made changes to interfaces and apm.sh to allow home wifi connection.
Can anyone provide a suitable apm.sh and interfaces file that lets me make it a hotspot again (and any other changes that I have to make that I've forgotten.