The one presented here is a.
How to change a upvc door lock barrel.
Only remove the key from the lock once the retaining screw is secured back into place.
Move the key slightly to the left and slightly to the right pulling the key towards you at the same time until you feel it release.
Slacken the handle screws.
Slightly loosen the door handle fixing.
Test the lock by turning the key both right and left a few times and gently tug on the key when it is turned to both.
With a barrel lock it s the cylinder that allows the locking and unlocking of a door.
Open front door to reveal the face of the lock.
Put the key in the door barrel from the inside.
How to change a upvc door lock.