Hmm, I likely should not have chosen this as a similar bug to mine as
grub booting (including chaining to windows boot process) was working
until I patched the new Windows 10 Education install.
GPT partitioning by gparted was done before I started the Windows 10
Education install. Once the Win10
Thanks for having a look at it, in the end I did just that. However the
warning message could be a little more informative (pointing to a
website where the alternatives are explained?).
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Your disk is currently partitioned to boot in bios mode, but you booted
the 16.04 installer in EFI mode. A warning message prompted you that
this could be a problem and recommended performing a bios mode install
instead, but you chose not to. You either need to perform the bios mode
install, or