The claimant in this case alleged several breaches of the Organisation of Working Time Act, 1997 and this case was an appeal by the respondent employer against a Rights Commissioner's award of €2,000. It transpired that the Labour Court almost doubled that award after itemising every breach of the Act. 

The case is worth a read if you are concerned with variable hours. For example, in relation to Section 17 of the Act - Provision of information in relation to working time - the Labour Court found that the respondent could not be in breach and could not have provided the Claimant a statement specifying his finishing time because it applied a ‘task and finish’ rule to the amount of work done i.e. finishing times were not capable of ascertainment in advance. However, it awarded €1500 against the respondent for allowing the claimant ro regularly work more than 48 hours a week under S.15 of the Act.
http://www.workplacerelations.ie/en/Cases/2014/February/DWT1416.html