Sounds like they have just tried to lever out the lock barrel.
Is the door damaged around the hole where the barrel fits?
The barrel is held in place by a C shaped thin metal clip that slots in the other side of the door skin. So you'll have to remove the door card to access the inside of the door.
The c clip will probably be sitting at the bottom of the door. You may be lucky and get away with just putting the lock back in place and securing with the c clip.
Can you still put your key in the lock barrel and turn it?
Norwich normally ain't a bad place. Do you live on the Larkman?
