Not all the bees swarmed from the Flow Hive, thankfully. A guesstimate would be around half are left but it is difficult to know for sure. I had inspected the hive before sending the photos so couldn’t send pictures of the inside looks like.
There were a number of queen cells, which I destroyed bar one (rightly or wrongly).
There was brood in all stages with good nectar and stores around.
As I only put the super with flow frames on yesterday, there was little to no activity there.
The Langsroth hive had the queen present, no queen cells, lots of bees on the super I placed yesterday, which was encouraging compared to the flow hive. No queen cells.
The only concern that makes me think they are thinking of swarming was the amount of bees at the entrance. I removed the entrance reducer as advised and the picture below shows the situation.
Would appreciate your thoughts.