"It has become necessary to remind employees to be aware of Company rules with regard to consumption of Company products whilst at work.
"a formal written warning and/or suspension of up to 5 working days may be given for a single breach of discipline that may include drinking on duty...."
"3The first breach of consuming alcohol whilst on duty will result in suspension without pay. A second breach of this rule will result in dismissal."
"As is apparent upon a close examination of the foregoing texts of the company's disciplinary code, the changes made to the clear-cut provisions of 1985 created the likelihood that company and union would divide over their meaning. The union was convinced that after 1986, an employee charged with a first time offence of consuming company owned product was liable to be disciplined but not summarily dismissed. The company on the other hand was satisfied that such an offence remained, as in the past, unauthorised taking of company owned product, constituting gross misconduct or theft and subject to dismissal without notice."
"We conclude that we must read Rules and Notes for Operation together and we remind ourselves that these formed an express element in the applicants' contracts of employment. It is therefore an issue not of what a reasonable employer might have understood by them nor of what the parties respectively believed to be the right interpretation of the Disciplinary Code but of what objectively, upon its proper construction, they meant."
"Consumption of company owned products ... is considered to be gross misconduct and may result in dismissal in accordance with the company's disciplinary procedure [our emphasis].
"No employee will be dismissed for a first breach of discipline except in the case of gross misconduct when the employee may be dismissed without contractual notice. In accordance with accepted industrial practice, the company reserves the right to decide what acts constitute gross misconduct. These acts may include:- (a) damaging or destroying company property (b) unauthorised taking of company owned products, cash or property."
"The first breach of consuming alcohol whilst on duty will result in suspension without pay. A second breach of this rule will result in dismissal."