Do you recognise this man?

Right now I am in charge of a renovation building project which involves climbing up and down tall scaffolding. I don't normally get involved in things like this, but... well it's a long and boring story. All I will say is that I am too old for it now and have vowed never to do it again. Honest.

Some weeks ago in the early evening, I looked out to see the man above climbing around an even larger scaffold and took this photo of him when he finally got down. He did not use the ladders, but clambered about on the poles of the structure. Very dangerous. I did not bother to call the police as they probably would not have bothered themselves and besides, he looked like an ordinary nutter rather than a cat-burglar.

My job includes setting a scaffold alarm which is controlled from an app on my phone. When someone sets it off by walking in front of one of two detectors - front and back - the outside siren howls and my phone makes a sound like we are all under nuclear attack. When you go to the app it shows a series of one repeating video and two stills of the intruder. 

Last week at around dusk it was set off at the rear. I went to the app and saw a picture of someone's legs walking along the bars in the gloom. It has infra-red but the image quality is very poor and small. Basically it lets you know if there is a human or a pigeon outside.

I went to the window and found a man climbing up the scaffold, unheeding my shouts telling him to get down. I recognised him, It was the man above.

Pretty soon there were many police shining torches up from the ground.  They sent a fireman up to investigate, which I thought was cowardly and unfair. I reset the alarm to catch the man going back down, but all I got was a photo of the fireman. Somehow he disappeared without trace. After an hour, everyone gave up and went home.

At least I know what happens when the alarm is triggered.