This thesis re-examines the material included by Piggott in his Secondary Neolithic cultures. A detailed study has been made of the pottery styles known as Peterborough and Rinyo Clacton and a catalogue of this pottery accompanies the text The Peterborough pottery style, previously only studied in depth for south-eastern England, is found to extend over the greater part of England, and the chronological series of Ebbsfleet, Mortlake and Fengate styles found to be applicable throughout. A fourth style, Peterborough Northern, is recognised in the north of England and southern and central Scotland. This is seen to develop as a result of southern Peterborough influence upon localised Neolithic pottery forms. An examination of the sites upon which Peterborough pottery is found and the artifacts with which it is associated supports the thesis that the Peterborough complex is a continuation of the earlier Neolithic culture of Great Britain. Rinyo Clacton pottery is divided into four styles: Skara Brae, Clacton, Woodhenge and Woodlands. The associated artifacts include certain types not known in earlier Neolithic contexts and at least one new type of site, henge monuments. This would indicate that Rinyo Clacton pottery represents the development of a new culture. The decorative techniques and motifs of the pottery and certain of the artifacts suggest that the origins of this culture lie in the strong Irish influence present in western and northern Scotland in the second half of the third millennium. The continued use of earlier Neolithic artifacts and the Neolithic Round Barrow emphasises the strong native tradition continuing within the Rinyo Clacton culture.