The Office for Nuclear Regulation (ONR) is the Great Britain (GB) Competent Authority (CA) for the civil carriage of UN Class 7 (radioactive material) dangerous goods in Great Britain by road, rail and inland waterway (limited provisions only in GB)by virtue of The Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations (CDG) 2009 . These regulations transpose into GB law the European modal requirements (ADR  and RID ) for road and rail transport and limited aspects of ADN for inland waterway transport. ONR also acts on behalf of the Secretary of State for Transport and the Maritime and Coastguard Agency for transport in UK waters; the Civil Aviation Authority for air transport; and the Department of Agriculture, Environment and Rural Affairs Northern Ireland for road transport in that part of the UK in respect of certain functions .
ONR understands that due to legal or regulatory requirements in overseas states, some vehicles arriving from / destined for overseas countries may bear additional marks in excess of legal requirements in the GB. For example:
ONR does not object to additional information being provided in excess of GB legal requirements in order to satisfy the requirements of overseas states, where transport in that state is an intended part of the consignment, and any such additional marking does not degrade the visibility of marks required in Great Britain and Northern Ireland.
Dutyholders, consignors/carriers, should contact the Competent Authority of the respective state  to determine the requirements of the individual state in advance of any transport of radioactive material.