In article , Chris Bacon
writes
Kay wrote:
Chris Bacon writes
Your best bet is probably to do them in, somehow. Shame,
but probably most practical.

No, I'd prefer to delay the installation.

Great! As in my earlier post, when the frosts come will be OK,
they just may buzz off earlier. FWIW you may have got white-
tailed bumblebees (Bombus lucorum) - a look on Google images
will show you.

It would, but I haven't got that close to mine yet ;-)

But it would appear mine aren't B lucorum since these appear to nest
only underground.

So that might suggest masonry bees. There are various horror stories on
the web of considerable tunnelling damage done by them, so perhaps we
ought not to encourage them back next year. Anyone know what they are
likely to do over winter? Can we re-point and keep them out, or will
they be hibernating inside?
--
Kay
"Do not insult the crocodile until you have crossed the river"