At first I thought that the BIOS Recovery Update documented here did not work on my NUC but I have since discovered that it only works if the USB stick containing the .bio file is in one of the rear USB ports. If you place the stick in one of the front USB slots, remove the BIOS jumper and reboot, all that will happen is that you will get warnings that the BIOS jumper has been removed and BIOS recovery will not occur.
Given it wasted a few hours of my time, I thought I would publish the tip.
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