Flat still extant

My letting agents inspect 4 times a year, which seems excessive to me.  I have made my peace with this, as it forces me to tidy the place, which is a Good Thing.  Which is what I spent yesterday doing.  The inspection today took approximately 10 seconds - may have been as long as 15.  I don't really have an issue with this - I'm tidying for me, not for them - but it does make me curious as to the purpose of the inspections.  Is it to check I've not installed a fireman's pole or demolished a wall?  It's hard to see that anything less obvious than that would be picked up by it.

I conclude that the most likely reason for the inspections is to ensure that the property is thoroughly cleaned 4 times a year.