In reply to Fozzy:
When I used to live in London suburbia our area went through some horrendous bouts of burglaries, so much so that the local police helped out with a local talk giving advice on how to protect yourself. A couple of points I remember...
Apart from the alarms, burglars hate permanent outside lighting (not motion sensor lighting, that's less effective). Doesn't have to be bright, but have some outdoor lights on all night that means there is no darkness to skulk in. Also gravel paths or drives that make a crunching noise when walked on can be effective if they suit your property. Nine times out of ten they are chancers, so if your property looks difficult to break into, they move on to the next one...looking for an easier target.
And if you really want to make sure you're rarely bothered, keep some geese and give them the run of your outside. Really only suitable if you are rural though.
Post edited at 16:01