20.73 km 68010.96 feet 12.88 mi 7250.00 seconds 120.83 minutes 2.01 hours 6.40 mi/hr
Had a 21 hour layover in Heathrow, so I went into town with a friend, Andrew Richards. Had dinner and a beer, spent the night, and rented bikes in the morning. Went for a ride on the Grand Union Canal west of the city center. Oops, I mean centre. No USGS topo map tiles there, so the map is unrewarding, but you can see the shape of our path, anyway.