Definition of "Birtley"

A hamlet in north Herefordshire, England (OS grid ref SO3669).  examples

A small village in Northumberland, England (OS grid ref NY8778).  examples

A hamlet near Ticklerton, Shropshire, England (OS grid ref SO4790).  examples

A town in the Metropolitan Borough of Gateshead, Tyne and Wear, England (OS grid ref NZ2756).  examples