What do I do with this? (wasp nest)

In the same way as terrorists enjoy watching their victims?

I have no problems with wasps in the loft until the last knockings when they either seem to lose their way, or they're attracted into the house by warmth. I suppose I'd rather die in the warm as well

That is your direct personal experience, in which case give the full story, or just hear say?

What more of a full story are you after ?

Sitting talking to my brother across a bench table in the back garden, suddenly felt the bugger sting me

bastard thing ...

More information on where it stung you? As you are obviously avoiding that I suspect it became inadvertantly trapped between you and something else and was about to be crushed.

That's what happened when I got stung by a wasp, it got up a loose T shirt sleeve when my arm was raised. When I lowered my arm it was trapped in the edge of my arm pit, it stung in self defence to avoid being squidged. It worked I lfted my arm and it flew away...

That's the usual reason for being stung 'for no reason'. Another is emitting whjat the wasp senses as a threatening pheromone - chemical messenger. That might be a dye in clothing or something which seems pleasing to us such as scent, after-shave etc - or just our own body smell even if we're not aware of it.

Wasps communicate partly through scent, they have a far greater sense than humans.

Mary

I did realise that, so couldn't blame it for having a go.

I have seen and heard one having a go at a fence post, so I thought they might be doing the same here. The nest was (is?) in the wall of what I think is a newish extension to the original structure, so the wood there is not old.

True. It was on a July evening last year, when I thought they would have been quiet. All the others were, as this was the only one I saw.