Quote Originally Posted by oldfred View Post
From liveCD terminal run & post this.
If partitioned with gpt and first (or second) partition is efi then you are in UEFI mode.
If partitioned with MBR(msdos) then you have BIOS & MBR.

sudo parted /dev/sda unit s print
Thanks a lot, Oldfred.

I do apologise for my extrene ignorance, but some translation into absolute absolute beginner langauage would be appreciated.

Many thanks,
Laurence