Nesting

We have a pair of long tailed tits nesting in one of our shrubs.  From the visits that they have been making recently I am reasonably confident that the eggs have probably hatched now, as both the birds are flying to and from the nest fairly regularly.  We're trying to stay as far away from the shrub as possible, so as not to disturb the birds, so there is now way for us to be 100% sure - but this one definitely seems to have something edible in his beak I think, rather than nesting materials?