An opinion was given in a case before the European Court of Justice (ECJ) which will interest a number of our clients who have workers who travel regularly as part of their role. The Working Time Directive (the Directive), defines "working time" as any period during which the worker is working, is at the employer's disposal and is carrying out his activity or duties. The Directive defines "rest period" as meaning any period which is not working time. The Directive is implemented in UK law