Yes, one of the chicks turned up this evening right on time. Just before that, two flew right past the box fast and tight - don't know if it was kids or adults or kids and adults.
A number of times Ivy was in the nestbox today, don't know if he was defending or trying to entice Princess to pair bond. This is the first time he's done this this year, didn't do it yesterday, will have to see what tomorrow holds.