Last update 1 March 2021
Mileages are given in the form miles.chains. 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.
19.908km/12.30 Heathrow tunnel portal end-on junction with HLL and ownership boundary (NR/BAA) 23.550km/14.51 HEATHROW TERMINALS 2 AND 3 23.667km/14.56 up line junction with HLL2 24.301km/15.08 down line junction with HLL2 26.520km/16.38 HEATHROW TERMINAL 4 Note that all stations include the term(Rail Station Only)on the National Rail Enquiries system. Heathrow Terminals 2 and 3 has been known by various names including use ofCentraland including terminal 1, sometimes together. Note that the up line is 0.057km shorter Note that this was part of the original HLL