Directions:

Rayleigh Laboratory (detached from the home), at Terling Place (home of Lord Rayleigh) - N51 48.13 E0 34.23.
RR Station, Chelmsford Railway Station, Duke Street - N51 44.18 E0 28.12.
"1" = Intersection A12 and Station Road (which develops into Terling Road north of railway track) at Hatfield Peverel (north of intersection by 80 meters is the Hatfield Peverel Railway Station) - N51 46.56 E00 35.70.