You will need lock picking tools to unlock a door without a key.
Upvc door locked no key.
Presumably if it is a upvc door the lock is the type which screws to the door edge and locks with four latches and the main bolt.
Open the door and look for the latch plate along the door s edge.
Place the short end of the tension wrench into the lock as far as it will go.
Improvised lock picking tools can be made out of common household items like bobby pins and paper clips.
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With the lock being designed in 3 main bits and the central.
Step 2 look for a small set screw at the base of the handle.
As people said you could drill it but sometimes that won t work.
Someone has mentioned the posidrive screwdriver and yes it is easy to remove the complete assembly.
A basic pin tumbler lock consists of the plug the key pins driver pins and the springs at its core assembly.
You can open a locked door without a key and without causing damage.
Turn it in the direction that you normally turn.
Unscrew this plate and remove the latch from the door if possible.