The GMB previously won a case against Birmingham City Council - Wetherill and others v Birmingham City Council - on behalf of 19 employees who were underpaid on their user car allowance. They were awarded back-pay of between £600 and £3,500 each. The underpayment came about as a result of a unilateral decision by the City Council to remove a certain car usage payment band - essentially a breach of contract. The Court of Appeal has now set aside the original order, finding that the Council did not abuse its power.