Metric Miler wrote:
Traffic, mobs of people that recognise him, pollution, narrow roads, journalists, unaware crowds of tourists/Londoners.
No thanks.
Although your answer brings up this question. There must be a fair few serious runners in London what with it being kind of a large city. what do they do for their long runs? I recall that in the past guys like Mottram, Bob Kennedy, etc. used London as a base for their summer seasons. I'd bet they weren't all on treadmills.