With only five weeks training, the British actor starting running an über-marathon around his country. Six days a week he ran the required 42 km before soaking his body in ice baths to “to stop your legs inflating to twice the size of an elephant” to say nothing of enduring blisters on top of blisters. On Tuesday, he finally stopped the pavement pounding in London’s Trafalgar Square. Why did the eccentric comedian run more than 1,700 km? To raise “billions” for charity.