A specialist surgeon is denied protection which is given to hospital doctor; a University professor, as a servant, has been denied the right to be heard, a dock laborer and an undergraduate have been granted it; examples can be multiplied [see Barber vs Manchester Regional Hospital Board , Palmar vs Inverness Hospitals Board of Management, [1963], $.C. 311, Vidyodaya University Council vs Silva , Vine vs National Dock Labour Board , Glynn vs Keele University One may accept that if there are relationships in which all requirements of the observance of rules of natural justice are excluded (and I do not wish to assure that this is inevitably so), these must be confined to what have been called "pure master and servant cases", which I take to Mean cases in which there is no element of public employment or service, no support by statute, nothing in the nature of an office or a status which is capable of protection.