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Mileages are given in the form miles.chains unless stated otherwise. Figures prefixed with ≈ are approximate, those in parentheses are not on this route but are given for reference. Reference to 'start'/'end' of an asset are as read down the page.
GUA Grendon Underwood to Ashendon Junction
159.10 Grendon Underwood Junction with MCJ3
161.57 AKEMAN STREET
161.61 later end of line
163.52 WOTTON
164.75 Ashendon Junction with NAJ3 (0.27) down line
165.21 Ashendon Junction with NAJ2 (33.55) up line