As your flock free ranges whenever possible, can I suggest Swedish Flowers (very pretty as well as predator aware and great foragers) and/or Penedesencas (very predator savvy, great foragers, and dark brown eggs)?
It depends on whether the roos are related to your hens. If they hatched from home-grown and fertilized eggs, then you should be OK for several generations before swopping for new blood. If they hatched from purchased hatching eggs and your hens were not from the same source, then they should be...
Hi Donna :frow I have Nestera coops too and that used to be an issue, but now they spread about more. I think a broody hen swearing at anyone who comes in is quite the deterrent, but failing that, I found fake eggs in the other nest box(es) - golf balls will do nicely - helps.
That sun will...
hasn't it been wet here! The forecasters keep promising it'll warm up and dry up a bit, but I'm still waiting too! Whereabouts in the UK are you?
btw, did you know there's a UK thread? it's here
https://www.backyardchickens.com/threads/uk-member-please-say-hi.655508/