Boris Johnson is on course for another bruising showdown with his fire authority over plans to lock-out striking firefighters.
Members of the Fire Brigades Union have been staging a series of two-hour strikes in a row over pensions.
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John, who began running for Age UK back in the 1980s when he was aged 53, has raised an incredible amount since then - more than £40,000.
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.