The A1010 was the earliest section to be by-passed, by the Great Cambridge Road (originally designated A108) Ordnance Survey One Inch New Popular edition Sheet 160 London N.W., Full rev 1930 with later corrections Published 1945 Ordnance Survey One Inch New Popular Edition Sheet 161 London N.E., Full rev 1930 with later corrections Published 1945 which runs parallel about 1.0 miles to the west.