AbstractThis paper reviews the process of privatization under successive British governments. It concludes that the Thatcher experiment has had an effect in reversing the previous trend towards nationalization. This has been part of a continuing worldwide swing away from government enterprise. The major result has been an increase in internal efficiency (as distinct from allocative efficiency) of the enterprises concerned. Purchases of shares by management and workers of privatized firms has created an important lobby which will oppose renationalization by a future government.