Very slooow progress.
I have a pair of Bluetits going in and out of my new nest box ( at least I assume it's a pair).
If they do rear a brood the baby birds will be sitting in comfort because the adults are lining the box with dog hair. Roma has decided to cast her coat so I've been putting handfulls of soft undercoat in the hedges for the birds. It seems to be popular because it soon gets taken. Roma makes sure there is plenty to go round, she helpfully leaves huge amounts all over the carpets which manages to spread everywhere.