Thanks all - I thought it was a funny time of year for moulting, but yes, Fleecewife, they laid all winter and haven't show signs of moulting before this. I will up their protein with some mealworms etc. and see if they come back into lay. We will probably get some more ex-batts anyway as they do lay so well normally. We've got used to having our own lovely eggs - one the one occasion I had to get shop-bought they really lacked the flavour!