I carefully unfolded the sheet and spread it out on the runway, lifted the box and gave it a sharp tap: all the bees dropped onto the sheet spread on the board. The first few bees crawled into the hive. If the bees like what they see, they fan their wings to spread their pheromones and all the others, including the queen, then crawl up into the box. You can see in the photos the bees clustered round the entrance fanning away to attract the others.
Many thanks to Trevor Potts for story and pictures.
Trevor runs the Ardnamurchan Campsite.