Although we're still not getting huge numbers of eggs the numbers do seem to be improving.
Thanks to anyone who left advice when I asked about stopping an egg eater.
Regular egg collection by my wife and two little "helpers" have helped the most I think (and it's not been easy for her in all this mud and wet with two little ones). But I've also made sure there is plenty of extra bedding and added a grit feeder as well as mixing it in their food.
I've not seen any wet, eggy patches in the nest boxes in a long time so, without wanting to use a pun, maybe we've cracked it!
Thanks again for all your help and advice.
Blogging is such a good tool for a homestead! Real advice from people who are living it is hard to beat!