To ask why?

[WhyCantIuseTheNameIWant]

Or more likely, who?

Twice this week, when we have returned home, the wheely bin has been laying on the path.

Now, it's not sunny. So I know it's not wheely-bin-sunbathing-season!

My first thought was the wind. But the wind hasn't been that bad. I have a classic car on my drive, with a rain-cover on. If the wind is bad, the cover will blow off the car. The cover has stayed put all week.

Second thought was ds, on his way out to school. He leaves at 8. We leave at 9ish. It is upright when we leave, so can't be ds...

The cat? Although he would probably end up inside it if the wind blows the lid open...

Any clues? Should I be paranoid?

Poltergeist probably.

I dunno though. Have you ever watched one of them blow over. It's quite unreal.
If they have the wheels at 180 degrees to the wind they go straight down.

I would be suspecting a curious elephant or maybe Ratzilla?

I'd think fox or cat/rat.

Your bin is possessed