[Seeker]

My house inside rear door lock jammed with the handle in the "up" position and wouldn't go down, locking me out the house. Resorting to brute force and ignorance I forced it and managed to get back inside and the lock mechanism seemed to be functional albeit with a drooping handle.
I called a locksmith and he told me exactly what had happened and quoted £195 to fix it today. I looked on youtube and found a video on how to remove the mechanism (it's full door length) and the locksmith was correct - part of the gearbox was bent.
I started looking for complete assemblies and they were about £95 but on investigating further I found the gearbox could be ordered separately - mine is a GU Ferco 35/92 old style. You can buy them for £30.
I've ordered one and cancelled the locksmith.
Hopefully, this will end in SOTD and not OMG/bugger!