An Oxford University professor explained how the UK's entry into self-drive cars uses a more affordable system of lasers and camera.
Professor Paul Newman said: "When the car is driving, it is using a small, quite cheap laser on the front of the car that casts a curtain of laser light vertically around.
"As the car moves, it paints the world with this invisible laser light and produces a local idea of what the world looks like in 3D."
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Rain spreading eastwards throughout the day.
"His fiancee gave birth this morning, of all mornings! We were scared because we've got Glastonbury tonight", said co-singer Chloe Rhodes.
Festival-goers have been enjoying the second day of the Glastonbury festival.