Well I say 'Lost' but actually the wife left the key inside and closed it.
http://www.flickr.com/photos/53669294@N08/4953921730/%5B/url%5D
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 !