The doctrine of illegality in the law of contract generally is complex. Furthermore, a great deal of it is not directly relevant to employment law. Any discussion on the doctrine of illegality in the law of contract generally would therefore be irrelevant in a work treating solely illegality of the contract of employment. Cases concerning aspects of illegality relating to contracts of employment have at times come before industrial tribunals and the courts. It is therefore proposed to limit the discussion to those aspects which concern solely contracts of employment. For a reader reading on the subject the reader is referred to the standard textbooks.