The employees of Big Department Store in Meadowvale Shopping Centre had been represented by a union for several years. Shortly before the most recent collective agreement was about to expire and before a notice to bargain was given to management by the union, the employer sent a memo to all employees announcing that it would no longer provide free parking for its employees in the shopping centre's parking garage. Within a week, notices to bargain was given by the union and in the subsequent negotiations the free parking matter was made a bargaining issue. The union also alleged that the employer had breached the law in its announcement of this matter. What issues does this situation raise?