Inside St Llywel's Church, Llanllowell / Llanllywel

To unlock the door, insert key - turn -unlock - remove key - turn upside down - turn key as if to lock door - unlock - door open. Hurrah! Locking door was reversal - key upside down , lock, key in again normally, lock! Has anyone else ever found a dual bolted door lock operated with a single key?]

(Information provided by Phil Draper)