Not all countries have a comprehensive framework of regulations and guidance to ensure that underground construction work is conducted in a safe and healthy manner. In those which do, the regulations normally lay down as broad principles the measures that are to be adopted, but detailed guidance may be left to national standards or industry publications. The “Guidelines for Good Occupational Health and Safety Practice in Tunnel Construction” are not intended to replace existing national regulations or guidance but to provide guidance on basic good practice where none exists. As such they should be incorporated into contract documents where appropriate. These guidelines contain details of publications relevant to health and safety in tunnelling from countries represented on WG5.