So glad Princess chose the nestbox - the last two of her eggs were laid in the rain which when you watch her laying eggs (granted it is faster than human delivery but she's such a little bird) making her do it in the pour rain would just be Nature being a nasty so-and-so.
The box may not make the process any less seemingly unpleasant but at least she napped in the dry on the eggs until a couple of minutes before, she was dry, sheltered from the wind and disturbance during and then she was back napping 10 minutes after.