The key needs to be in the 1 or 11 o clock position depending on which side of the door it is in order for the lug to be central with the barrel thus allowing the barrel to be removed.
Upvc door lock barrel stuck.
The repair will usually involve either.
Freeing up or replacing the shootbolts and rollers.
To do this you need to drill through the barrel directly under the key hole using an 8mm steel drill bit drilling a pilot hole is recomended first.
Repairing a jammed or stuck upvc window.
As your key is stuck the barrel will have to be drilled out.
This will drill through the retaining lug hence the barrel will now come out.
Probably that lock retaining screw will be much longer it ll be hidden under the.
Then insert the key into the lock and turn it about 10 degrees to line up the inner latch of the lock with the body of the lock.
Especially if your upvc door lock mechanism is sticking it s usually down to the fact that you have an old door which needs replacing.
Checking the connection between the locking mechanism gearbox and the shoot bolts.
To change a upvc door lock start by unscrewing the retaining screw which is located on the faceplate on the side of the door.
Next once the cylinder is loose pull it out of the socket it s in and take the key out.
Upvc door won t lock when closed shut should your upvc door not lock when closed shut this is due to alignment and in most cases is easy to fix either by adjusting the lock strike keep or roller points or by adjusting the door hinges.
The replacement of the locking mechanism gearbox as lugs can break off within the gearbox.
Looks like that whole stainless strip will have to come off the same as if you had to change the lock itself.