HaHa the age old problem .
An old trick that works if there are hived or feral honey bees in the local area that's six miles across or slighty bigger from your apiary at the centre .
Is on the first of April , assemble & locate safely an empty brood hive with one super of frames as well . Coat all the the frames with a mixture of locally produced honey and water , use a new trigger pack to spray it on. Now wait till mid June to see if the soon to swarm bees home in on the honey scents and that you get a prime swarm take up residence.
There are also bait hive attractants that mimic various hive pheromones that encourage inquisitive foraging /scout bees as well . These are sometimes found in the better bee supply shops online.
Whilst not 100 % guaranteed I found both methods worked reasonably well ..
If swarm does take up residence you'll need to treat it for Varroa fairly quickly . before it become well established 7 starts affecting the hive.
Whilst your waiting for the invaders
you can also be learning with a competent keeper .. Often if they are like me & you both got on well they'd will give you a couple of frames of brood two empty drawn frames & let you provide the other undrawn frames to fill the neuc box , plus a couple of cups of their bees box to get you started in exchange for some drawn frames or new un drawn frames that suited their hive system .
The reason for the specific start date of the first of April is that generally for the UK , the first swarms usually issue from the hives as prime swarms with around 45 thousand bees in them. They will be all ready to start a new colony with every resource they require for the task, including a new queen ... between 9 April to the mid June depending on the weather.
After that the swarm get's smaller & smaller till , " In July... it ain't worth a fly "