Public sector rules are sometimes broken and when this happens, you should challenge the relevant authority. The route for challenge depends on the country but these are always published. In Scotland, for example, you should use the Government’s Single Point of Enquiry.
Public sector procurement is often thought to be an administrative jungle and is therefore avoided by many companies. There is however, a guarantee of fairness as buyers must follow EU regulations. This is not the case with business to business or private sector procurement.