Oh no - Brenda's gone all broody!
I've forcibly ejected her from the nesting box twice in the last 2 hours and she was pretty non-plussed. I can't quite work out the dynamics but suspect that the other girls are squeezing in beside her, popping an egg out and then she's keeping it warm for them! In fact they're so warm I think they're almost starting to cook!
She's still laying for the moment but I'll have to have a search on t'internet tomorrow and see what I can do to snap her out of it.