Glad you had a reply,Bern.
It seems they have had a cursary sweep of the actual treads but the not the edges. the pile of feathers and poo and fluff has diminished around the the bit that the broom touched. So.no. It's not acceptably clean by anyone's standards.
Here's just the corner of one of the steps. They are all like this.
They say I need to make my photos into PDF format for them to be able to see them. I'll try but don' know how.
I took these photos yesterday