In message , T i m
writes

When locking the door you first raise (and release) the handle
(either) that (just) engages the shoot bolts, but also clearing the
path for the cylinder tang to turn and (with two revolutions of the
key), double lock the deadbolt, and restrict the shoot bolts from
being released.

So, if you unlock the deadbolt and carry on turning the key past the
two turns till it stops, the next (maybe) 20 degrees would release the
latch. If you were / could to keep the key in that final position and
*then* use the handle to release the shoot bolts, I'm wondering if
that would keep the load off the latch or if it should, if the top and
bottom shoot bolt plates weren't worn to the point where they weren't
taking the load off the latch ... ?

I think the effort involved in moving the latch with the key is going to
be too much for Angela so I'll ask the installers to change it.

Don't want them on site at the moment as there was a conflict over
window sizing which led to the carpenters cladding being ripped off!

Builder wasn't going to do the job without payment and the glaziers were
adamant that the openings were measured accurately. To move on, I did
the job myself. All part of being clerk of works:-(

I'll pop over again in a mo and try some more stuff. ;-)

Cheers, T i m

p.s. I see Turnpike is still working. ;-)

The old ones are best. Anyway I have 3 pages of d-i-y posts pinned for
future reference and don't want to consider transferring that lot to T
Bird.

--
Tim Lamb