Oes Thatcherism mark a radicle break in british politics?

essential source: M. Plug (1994) The Era of Thatcherism in state and society: British political and social history, 1870-1992, Hodder, London.

Thatcherism must be defined(politics,ideology and economics associated with her) relate it to results and affect effect positives and negatives.

The term Radical break must be explained. What marked change did Thatcherism bring about? positive or negative