[monkeh]

I'll chime in again. Mine jammed up and I needed to extract the grille to get at my catches.
Long and short of it, the remnants of the remnants of the swirl flap linkage prevented my bonnet from being released.

Drivers side headlight houses the microswitch for the driver info/ecu.
2 x 8mm bolts hold a panel that covers the latch. Also holds the latch in place.
A screwdriver can pop off the plastic cover underneath the latch assembly, There will be the microswitch, obviously you can press it to test it. If it doesn't respond, then the switch could be replaced. I didn't look for its harness connector as I was more focused on why my bonnet wouldn't open.
The hinge looks like it will easily make contact with the microswitch so any issues with it should purely be electrical.

Hinges? I soaked mine in petrol to degrease, then soaked in oil to lube them back up.