Thanks for the reply guys,
Unfortunately my car isn't locked as when I bought it there were no keys for the door or trunk. I was thinking on the lines of a hidden switch and will look into this. I did tonight look at a steering wheel lock but with the small thickness of the wheel they are useless. next I tried to remove the rotor but its electronic ignition and the rotor doesn't just pop off.
I have looked at a remote motion detector alarm this may have possibilities.I thought of putting a sign in the car window saying, 'CCTV Now Installed.'
Unfortunately my Colt 12 gauge pump (Prison Riot Gun) and 45 colt (Peacemaker) I left in America along with 8 other guns, but I like the idea :o).