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Time: 13:49 UTC, 14:49 local Estimate of longitude: 0° 30' 1.4" W = -0.500389° Estimate of latitude: 51° 29' 1.4" N = 51.483722° Possible error on position estimate: 10 metres ![]() The M25 near Heathrow, at a point where it forms the boundary of Greater London. I entered London this way once when I was first experimenting with long days of cycling. | |