Just had a knock at the door. There are 2 bells at this property, and only one was rung, FOR DEFINATE.
I answered the door and a very flustered man said "oh errm sorry, must have got the bells mixed up, pressed the wrong one, sorry" And then hoverred his finger over the other one.

As I came in, I listened, and sure enough.... nothing!

Now I dont know if he was expecting only my elderly mother to be in, or just trying his luck. But dressed in a polo shirt, and carrying 2 tool boxes, the average joe might think he was genuine if he said gas check or something else. Especially the elderly.

Just thought I would share it, and remind people to always ask for ID. If anyone else gets a knock from this guy, its worth telling the police about.