I have a sneaking suspicion that what I collected wasn't actually a swarm but may have been the remnants of another Beekeeper's laying workers colony which had been shaken out. It was a small cluster of bees, they didn't really go into the collection box as I would have expected a swarm with a queen to, they initially went in but then kind of spilled out again and stayed on the outside, but didn't go back to the cluster site. I wrapped them very carefully (loosely)in the sheet I had laid out for the purposes. In hindsight it would help to explain the quick onset of laying workers? I can't help chuckling at the concept of beekeepers finding laying workers, shaking them out, another beekeeper later collecting the "swarm", finding laying workers, shaking them out...