Affiliation: | * Simpson and Marwick Lecturer in Law, University of Edinburgh. I am very much indebted to Professors P.L. Davies, K.D. Ewing, M. Freedland and H.L. MacQueen for their critical comments on earlier drafts of this article. I am also grateful to Brian Napier for bringing a number of points to my attention; in particular the question of contracting-out. The responsibility is mine alone. |