Sir Digby Chicken Caesar has requisitioned your storage receptacles for a Top Secret mission. Please ask no further questions.

Were the definitely yours? Maybe they got caught up in the wind we had and accidentally mixed up with another house.

Someone is out there is vaguely confused by a text from an unknown number that reads "Hi mate, pissed off waiting for the skaffie. I'm heading to the tip with my bins. I can take yours too if you want".

Private investigators? Maybe they were hoping for electronics with the metal one.

Kids?

Or maybe someone was looking for bins to help fly tipping and found yours.

Or kids?

No idea really. Was it all paper/cardboard recycling? Maybe someone needed extra material for a bonfire?

I think you're going to have to get "Sherlock Holmesing" the area around those bins and back streets for clues.