Ok, the barrel of my patio door lock decided to explode on the back
door in a shower of small pins and springs.

Being the keen DIY'er that I am, I though, 'how difficult can it be' ?

AAgghh

Right, for anyone in the know it's a "Adams Rite" lock, and looks to me
to be a '4036 screw in cylinder'

Markings on the lock mechanism are on one side

3 80 1 1/8
and the other
4 80 1 1/8

so a few questions

1) Does anyone have an old (70's 80's from the look of things)
aluminuim patio door with a couple of these on ?

2) Or a source of cheap spares

3) Or exactly how the lock barrel actuates the lock mechanism, I can't
for the life of me see how it does it, as the barrel end doesn't engage
the slot in the lock actuator, and there's no pins etc that I can see
to move it ?

4) A possible complete replacement

5) Or if there's a decent locksmith in the North Hampshire area ;-)

I've got secondary locks on the door, but they're not all that, so i've
got a bit of grace period, but not much.
Any advice appreciated.

Cheers,

Paul.