Locking mechanism identification help, old uPVC door

[JamToday]

The lock in my Mums old uPVC door is broken.

Someone has made it so the lock fixes in the centre when locked but the locking mechanism top and bottom doesn't engage.

Can anyone help me to identify the mechanism?

 

[crank39]

Bit vague those pictures, can you stand closer or use a telescope

But from what I can see it's a basic 4 roller latch and deadbolt mechanism and using my super service engineering skills I would say that's a GU 35/92, maybe you can confirm it says GU somewhere on the metal strip, the numbers are the gearbox dimensions