Raising £75,000 for charity
Four men, one boat, two-thousand miles; two goals - to get there alive, and raise £75,000 for charity.
Leo, Luke, Oli and Dan are The Common Oars - they're rowing non-stop around the British Isles for the NuVasive Spine Foundation; a charity helping patients with spinal conditions in developing countries.
After leaving London Bridge on 27th May, they've just past the Isle of Man on a challenge expected to last for 26 days.
They're not professionals, either.
Tanya Humbles talked to Luke Tasker earlier, he's just completed his two-hour shift rowing in the Irish Sea:
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