to think that January is not the 'time' for wasps, flies and bluebottles?

[WildeWoman]

In the past week, there have been 2 flies and one bluebottle in the house.
Just now, as I was opening the window, when a wasp nearly flew in!

WTF???????

It's all that global warming stuff, innit?

Central heating?

Well, the wasp outside had no access to central heating!

First year I've ever seen flies/bluebottles/wasps in the middle of winter - and after a week of particularly cold weather too!

You don't know where the wasp came from though. You or a close neighbour may have eg a nest in the eaves or roof space and it was taking a very quick constitutional. Who can tell.

PS - the flies likewise, I'm afraid.