Entire Roman streets and around 10,000 perfectly preserved artefacts have been uncovered in the heart of the city.
The discoveries have been preserved so well in muddy water that archaeologists have dubbed the site the 'Pompeii of the North'
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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.