Well I say 'Lost' but actually the wife left the key inside and closed it.

http://www.flickr.com/photos/53669294@N08/4953921730/
The plate on the door actualy goes around the door edge and onto the inside of the door - at first I though I could unscrew the 2 visible screw heads and prise the remaining one but it will still be attached on the inside. Screwheads on the door edge lock are covered by the locking mechanism.
Options I see are:-
- hammer time on the locking mechanism but as it's a little rounded I'm not that I'd be able to hit it with sufficient force. (would it matter if it was hit top i.e. clockwise or bottom so spinning ant-clock ?)
- prise mechanism from door frame - likely to cause some damage but as the wood is old and possibly a little damp it might come out without too much of a fight.
- Drill mechanism - I guess I'd just have to drill and destroy the barrel ?
- Locksmith (phoned and looking at £70 to £80 to enter and replace)
help / suggestions appreciated
p.s. and yes I was on here asking about removing security tags a few weeks ago - just a coincidence / run of bad luck !

