Britain's road network will in the future be repaired by robots which will be able to fill in a pothole in a minute, experts have said.

Professor Mark Miodownik, of University College London, said a fleet of autonomous road vehicles or drones would travel around cities identifying cracks in roads and pavements and fixing them before potholes develop.

In just one minute, a robot with an attached 3D printer will be able to spray asphalt into a crack in the road to repair it, he told the Cheltenham Science Festival.

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