Sometimes you just hear about these things... Problems that people encounter and then find a brilliant solution to.
Today I was listening to the radio, Newstalk 106 as always, and heard this British guy talking about his new key delivering company.
The idea is like this: people register online and send their spare house key to them. Then when they lose it or lock their key in - they just call them. 24hrs delivery, anywhere in London.
The fee is something like £30 a year and then an additional £20-something when you need to get your key delivered.
Pure dead brilliant. www.mysparekey.com