I have a reasonably recent Kenwood floor standing cooker with a double oven
and drop-down glass fronted doors (one broken). I can't for the life of me
figure out how to remove the door. Most of the (cheaper) range cookers seem
to use exactly the same hinge. Is there a clever tool that releases the
sprung hinges, or some other technique that I am missing?

(Yes, I know I could use an angle grinder, but I'd like to repair or replace
it).

TIA!