Harmondsworth is a village in the
London Borough of Hillingdon with a short border to the south onto
London Heathrow Airport. The village has no railway stations; however, it adjoins the
M4 motorway and is bisected by its predecessor, the
Bath Road. Harmondsworth is an ancient parish which once included the large hamlets of
Heathrow,
Longford and
Sipson. Longford and Sipson have modern signposts and facilities as separate villages, remaining to a degree interdependent such as for schooling. Its great barn and its church are well-repaired medieval buildings in the village. The largest proportion of land in commercial use is related to air transport and hospitality. The village includes public parkland with footpaths and butts onto the
River Colne and further land in its regional park to the west, within
Colnbrook.