White Horse Common is a hamlet near North Walsham in the North Norfolk district of the county of Norfolk, England. It is located to the southeast of North Walsham town centre. It forms part of North Walsham's civil parish. History. Mission Church. White Horse Common was first established in 1883 and 1892, with the establishment of a mission church in the area. The church was in use until around 1933. It has since been converted into a private residence. Pillboxs. A historical place of interest are two former WW1 pillbox's located on the "Pillbox Trail". Geography. White Horse Common is close to North Walsham and the settlements of Spa Common and Honing. It is mostly rural but partly attached to North Walsham's urban area.