Here's what the Dartford Crossing will look like when the tolls disappear later this year. From October, ANPR technology will be used to charge drivers - similar to the way the London Congestion charge works.
Driver will also be able to pay online, at selected shops or by phone. The crossing will still be free to use between 10pm and 6am.
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The Duchess of Cambridge has been driven to St Mary's Hospital in London in the "early stages of labour", Kensington Palace has said.
The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.