Have been watching as much as I can over the last couple of days to always find a parent on the nest covering the chicks. Tonight at 9 pm (a favourite time for the parents to fly together got to see both nests clearly First good news is that there are 2 chicks in both nests. Here is the chimney nest with parent just arrived feeding 2 chicks. It was clearer live but definitely 2 chicks.

On the chimney nest a better clip of the 2 chicks.

The chicks are so much more active already.