In June, the presence of two pipistrels had been reported by the school, but last week the environmental health department found that bats know their multiplication - more than 1,000 were inhabiting the roof space.
The council had to consult Sottish Natural Heritage, surely a first in Barrhead, and take advice on the effects of bat fleas and droppings. The colony could not be expelled, only left suspended.
Fortunately, the school has only a 77 per cent occupancy rate. So pupils and pipistrels may be able to coexist. One lot, presumably the bats, are described as "a nuisance but not hazardous."