I checked the nestbox in our garden in which a pair of robins were nesting. They were very busy before we went on holiday, but all is now quiet.
In the nestbox was a well made nest with no dead young and no eggs. I assume they all made it and flew.
Robins can live to 11 years but most die by their second year, killed by predators or the cold. I hope these little ones manage a few years. It would be good to see a second brood.