Olympic kayak sprinter Ed McKeever is known as the Usain Bolt of the water.
But today it was all rather more sedate, as he joined volunteers to help clear up the navigation channel of the River Lea in Bow.
It’s all part of the lottery funded Big Waterways Clean Up project - a scheme to help clean up rivers and canals in the five Olympic boroughs.
Since February more than 3,600 volunteers have joined in the project. It's due to end in December and now the hunt is underway to find more funding - to allow it to continue.
More top news
By law, the Met Police has a duty to police public land outside grounds - that's costing them £9.3m a season.
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.