I need a wireing diagram for a Vauxhall Corsa's ignition switch?

Bit of help needed. I have just had my car back from the police after soon idiot stole it. They have ripped the ignition switch out of the steering column and started it that why, Anyway, I have replaced the steering column and ignition switch but need a wiring diagram or instructions on what wire goes where in the back of the key barrell. There is one black wire one black wire with a blue strap on it one red and a thinner wire which is red and some sort of brown. There are 4 wires and 5 points on the key barrell it could go. Any suggestions.