Shop stewards, or other forms of workshop representation, are a common feature of British industry. It is not known for certain how many such shop floor representatives are active; estimates vary between 90,000 and 200.000, “the truth is probably somewhere between these two figures”. What is certain, however, is that the great majority of industrial workers, particularly in large-scale industry, have recourse to lay trade union representation for the settlement of shop floor grievances. Often such representatives are “the union” for the ordinary workman who does not come into contact with full-time union officers. “For the great majority of British trade unionists the workplace representative is their only direct personal link with their union.” He also provides a front-line defence against the arbitrary use of authority by management. If no shop steward existed, managerial authority, unchecked by the countervailing power of shop floor representatives, would be open to abuse. If such managerial authority was also supported by a system of legal powers which further strengthened its position, it would make possible “the use of penal sanctions to compel acceptance of working conditions which free agents would not endure”. Such was the case in the British Merchant Navy until less than five years ago.