BIOS Settings for Dell XPS 13 9370
My Dell XPS 13 (9370) came pre-insatlled with Ubuntu Linux after using it for a couple of months a problem became aparrent. Their engineer came out and after replicating the diagnosis decided to replace the motherboard and storage.
Once the machine was able to boot a live Linux USB stick again I assumed it would be easy to install Ubuntu myself, but unfortunately it wasn't. After many failed installs and combinations of BIOS parameters I'm posting the final settings here in case it assists other Dell Linux users or me in future.
System Configuration > SATA Operation > Select AHCI General > Boot Sequence > Boot List Option > UEFI General > Advanced Boot Options > Enable Legacy Option ROMs (unchecked)