Posted: 04/07/2013 at 10:12
Rather than destroy the nest, you could use a large shovel to pick up the entire nest and move it to a sheltered spot in the garden similar to their current abode.As they are under a shed floor, covering them with a box and waterproof roof should suffice.
If they are living in the ground, dig a shallow hole, cover it with a flower pot and ensure they have side access for their workers.
This should be done in the evening at about dusk so that the foragers do not 'lose' their home. It is an easy thing to do and will ensure your pollinators continue to thrive!