Started cleaning a house in a well off estate and I set the alarm off cleaning the first window.
It took around 15 minutes for the main alarm on the outside to stop, but there was still an internal alarm going when I finished after approx 25 mins.
Not a soul batted an eyelid and there was no response from the alarm company or police which surprised me quite a bit.
What would you have done, I just thought sod it, I've set it off, not much I can do, might as well just crack on and finish.