Takeaway food, coffee, ice lollies - you name it - can be delivered to your back garden in minutes at the press of a button.

It won't come by road, where it might get stuck in traffic, but by air - arriving at your door still piping hot. 

This isn’t science fiction, it's everyday life in parts of Dublin.

Drones take off on their own, fly on their own, and deliver on their own.

So, how do they work, and who controls them?

And what's stopping them from landing in the UK right now?

Our Science correspondent Martin Stew saw the drones in action and tells Lucy Watson what you need to know.