From Heathrow Terminals 1-3 train to Lancaster Gate Underground Station, Tube to London Liverpool Street, train to Manningtree, then train to Harwich International. 2hrs 04min £43. From Heathrow Central Bus Station line 250 bus to Colchester Town Centre, Stanwell Street (Colch Bus Stn) then bus to Upper Dovercourt, Dovercourt Hospital. 4hrs 00min £13. From London Heathrow Airport (LHR) drive to Harwich. 1hrs 51min £23.