I recognise that

I’ve worked with many different environmental teams over the years. I know what a borehole looks like, how decibels are measured and how they measure air quality.

This is an example of the latter. It just looks like a little test tube on a lamp post. Not one of ours, maybe the council’s own or another contractor. It’ll probably stay there for around a month before being replaced and that one taken for testing.

I’ll have to let the team I work with know I’ve seen one in the wild next time I speak to them.