As part of their staff charity drives, Thomsons Online Benefits entered teams and individuals into the London Triathlon 2012 at ExCeL and invited me along to document their exhausting efforts.

It’s a gruelling set of tasks: a long swim in the docks, followed by a long cycle ride around the nearby roads, followed by a long road race on foot. Hats off to every single person who entered that, let alone completed it!

london event photographer london triathlon tob - London Event Photography: Thomsons at the London Triathlon, 2012