A response from the race organiser.
http://www.athleticsweekly.com/featured/race-organiser-responds-spen-20-saga-19639/
20 miles in 5 hours? 4mph is a brisk stroll, surely, rather than a running pace. I'm the world's crappest runner, but even I manage to lurch, wheeze and shamble along faster than that.
@Brommers started
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A response from the race organiser.
http://www.athleticsweekly.com/featured/race-organiser-responds-spen-20-saga-19639/