Original sentence: The West Yorkshire Urban Area is a term used by the Office for National Statistics (ONS) to refer to a conurbation in West Yorkshire, Britain, based mainly on Leeds, Bradford, Huddersfield, Wakefield, but excluding towns such as Castleford, Halifax, Pontefract and Wetherby which though part of the county of West Yorkshire are considered independently
Edited sentence: The West Yorkshire Urban Area is a term used by the Office for National Statistics (ONS) to refer to a conurbation in West Yorkshire, England, based mainly on Leeds, Bradford, Huddersfield, Wakefield, but excluding towns such as Castleford, Halifax, Pontefract and Wetherby which though part of the county of West Yorkshire are considered independently