From Heathrow Terminals 1-3 train to Lancaster Gate Underground Station, Tube to Stratford (London), then train to Colchester. 1hrs 38min £25. From Heathrow Central Bus Station line 250 bus to Colchester Town Centre, Stanwell Street (Colch Bus Stn). 2hrs 35min £15. From London Heathrow drive to Colchester. 1hrs 35min £19.