Fungi in horse dung

Several piles of horse dung have been plopped on the school gardens behind us. They have sat there all holidays and no doubt one of the first jobs for the students when they return next week will be to spread it out.
The horticultural teacher owns several horses and she is donating it to the school. Probably pleased to have somewhere to dump it.
I thought it might attract flies but it hasn't, in fact we have had very few flies this summer.
These fungi were a bit of a suprise when I walked round there to see what I could find. A bit difficult to kneel down and see underneath them so a straight down on top image.