Got a call today from a customer which is a semi secure unit for the
rehabilitation of ex offenders.

They couldn't unlock the managers office door, mortice lock activated by
a euro cylinder. Very odd, I could feel & hear the bolt retracting but
the door wouldn't open. Hinges were on the inside so I couldn't attack them.

Didn't really want to drill out or snap the euro cylinder because it was
operated by their master key and it was probably one of those anti snap
anti drill types anyway.

Jemmied off the slam strip and I could see the bolt retracting, but the
piggin door still wouldn't open.

Very bright torch revealed the problem. The bolt was brass with two of
those cylindrical steel pins that prevent the bolt being sawn through
with a hacksaw. One of the pins had worked its way out of the bolt &
was jamming in the keep. Eventually managed to fettle it back into the
bolt with a penknife and hey presto!

Never come across that before.