Update on this:
Wasp numbers much reduced by exterminating a nearby nest but a few are still getting in.
Had a very quick look out the 2 hives that are being attacked, saw the Q in the smaller one, but not the larger, though she may be there, there's a decent number of bees.
Hard to think either is the source of the swarm!
United the swarm with the stronger hive using air freshener, at least there will be more bees to repel the wasps!
The smaller one I plan to unite with a nearby hive as soon as I get a waspbane to put in its place.