Some more progress today.
Hinge pockets trimmed down to fit as I made them a bit too substantial, then slots cut into the door opening to allow the hinges to be offered up -
The hinges swing all the way round without obstruction, so it looks like my budget suicide doors might actually work!
I've attached them temporarily with a bit of threaded bar to allow for adjustment in and out.
Luckily enough I have a template to work from as Iris has them fitted as standard -
Job for tomorrow is to cut the slots in the door, mock it all up to see if it works and hopefully start bonding/glassing all the bits in place.