Complex sentence: In April 1958 Tyndall and Bean founded their own extreme-right group, the National Labour Party (NLP), based at Thornton Heath, Croydon, gaining early membership from a number of LEL members living in south and east London.
Split into simpler sentences: In April 1958, Tyndall and Bean founded their own extreme-right group, the National Labour Party (NLP). The group was based at Thornton Heath, Croydon and attracted its early membership from former LEL members living in south and east London.