Being prepared for next year

ExDancer, yes, I always have a supply at the ready. I stuff them with rags, enclosed in a plastic bag, when i need to use them. I'm allergic to insect stings (and very afraid of wasps).

They have their limits, though. I use them in the garden, to keep the area near the house free of scavenging workers. They are brilliant for that. I've heard that they're useless where there's an existing nest. They fool worker wasps, but not emerging queens looking for a nest site in your loft, for instance.

I also have the spray foam wasp nest killer - to be used with utmost caution - or get an expert in. If you spot the beginnings of a nest, the foam (used at night, from a distance) should destroy it.

Thankfully, this year, in London, I've seen very few of them around!

They have not really been a problem this year to be honest there’s been a lack of them.

I don't know.
You can get them on Amazon in packs of 3 and 4 so I'm getting some and will pit them up fairly early next year. Maybe in March.
But I really don't know, which is why I'm asking .......

Thanks for the reminder. I’ve had wasps living in my back wall all summer. Last time it was warm they were still coming and going. When should I put up a waspinator? Should I put up several?

I had one hanging from an acer tree this year, and it seemed to work.

Yep. I have one hanging under each of my three garden parasols. Seems to work,