 It was formerly a parish in the county of Middlesex covering the neighbouring areas of Eastcote , Northwood , Ruislip Manor and South Ruislip . The parish appears in the Domesday Book , and some of the earliest settlements still exist today , designated as local heritage sites . The parish church , St Martin 's , dates back to the 13th century and remains in use . The buildings at the northern end of Ruislip High Street form the core of the original village square and are now Grade II listed . It originally featured a central water pump which was moved out of the road in the 1970s as a result of increased traffic . 
