Ed - Thanks for the links, they actually reminded me that I already have a pair of these locks.
There were part of an earlier plan to fit boot hinges, that was changed to the "simpler" access panel.
At first glance, the shape of the barrel looks very similar to locking pins, so that may be another option.
With a bit of luck I will be able to get outside to do some work on the boot today.
Cheers, Paul.
PS
It's bad enough that I wake up in the middle of the night thinking about my build!
