Seconded.

If you do hear any buzzing or signs of insect activity, don't panic. It will
be small black flies which have hatched out of dead grubs. (I took one out
of a mothballed horsebox last year).

If you have do deal with a "live" one in the season because it is somewhere
*very* inconvenient, the aerosol sprays from hardware shops (less than a
fiver) are easy to use and not scary. They spray a jet of foam containing
insecticide about 10 feet or so, you block up the opening and then cover the
rest of the nest and leave them to die.