Help, UPVC door lock broken

dibbsey

I have a key stuck in my front door lock, the key is turned by 45 degrees so i cant remove it or the lock barrel (i know how to do this and have removed the screw from the side of the door)

Luckily the key is on the inside (of the house) and i can still shut the door and lift the handle to engage the 'hooks'.

Because of the orientation of the key i cant remove the inside door handle (but I'm not sure doing so would help, guess i could snap the key if this is essential).

How can i get the barrel out when i cant align the locking mechanism to allow me to slide it out? (if i can get the barrel out i can get myself a new one and fix the door myself).

There is a metal strip screwed down the whole length of the side of the door, would removing this allow me to get to it?