London Winter Run 2025 Start Time 2025. Start times are allocated by the estimated finish time you entered when registering and match the colour on your numbered bib. The cancer research uk london winter run is a ten kilometre challenge through the heart of the capital.

The london winter run 2025 is back, bringing with it an exhilarating mix of fitness, charity, and fun. By taking part in the 2025 london winter run and fundraising for cancer research uk, not only will you be taking on an amazing fitness challenge for yourself, but you’ll be helping to save.