So my Photons arrived yesterday. I powered them up and without issue got them connected to my wifi network. I updated the firmware to the latest version.
Compiled my code (developed on the core) on the IDE and flashed it to my Photons. Apart from having to remove flashee-eeprom references it runs perfectly.
I just wanted to thank everyone for their fantastic work on this system. I can’t mention everyone by name as so many people have been so helpful, but I must mention one @mdma the work you have done and are doing on this is incredible.