Water regulator Ofwat says it will challenge a request to raise water bills in the capital by 8% next year.
The request by Thames Water could see the average annual bill rise by nearly £30 if it goes ahead.
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It was Tom's second marathon in two weeks run in memory of his father, Martin Campbell.
Surrey Police are appealing for witnesses after the driver was seriously injured in the crash in the early hours of Saturday.
The Duchess of Cambridge has been driven to St Mary's Hospital in London in the "early stages of labour", Kensington Palace has said.