My information is 1 chick hatched, 1 egg. Willl have to wait to see if egg two hatches or gets shoved aside by one of the adults after a suitable amount of time has gone past. There was an unhatched egg in the Brandon nestbox until about 4 days before banding but by the time we got there on Tuesday, the egg was gone. Sometimes they "disappear" earlier, sometimes not. Egg could still hatch though after another 24 hours the likelihood drops significantly.