UPVC euro lock stuck in the lock position

[Harry028]

Hi guys.

The lock in the door to my conservatory is jammed in the lock position and when you put the key in, it just turns round in the lock but doesn't unlock the mechanism. I thought I might be able to knock out the pins in the hinges of the door to take the door out to get to the lock but that hasn't worked here:
View media item 63427

The lock in question is below, I think it's a euro lock but I'm not sure how to get it out without calling out a locksmith. Any ideas?
View media item 63428
Thanks everyone.

 

[Gazman16]

Sounds like the cylinder has had it and will need drilling out Im afraid.
There is another method but I dont like posting it on an open forum so will send a pm.