On 13/08/2020 15:20, Another John wrote:
My question: will winter kill this nest and all its inhabitants, or am I
going to have to call an expert?

The nest (and the queen and all the workers) will die in autumn.

After eating all the greenfly and other garden pests for miles.

I've got one I think I'll need to take out - but just because I think
they are converting our thatched roof into nest

Andy