This Published Document contains non-contradictory complementary information for use with BS EN 1992-2 and its UK National Annex for the design of concrete structures. It does not cover assessment. This Published Document gives: background to the decisions made in the National Annex to BS EN 1992-2 for some of the Nationally Determined Parameters; commentary on some specific subclauses from BS EN 1992-2; commentary on the application to bridge structures of some specific subclauses of BS EN 1992-1-1 that are called up in BS EN 1992-2; guidance on subjects not covered by BS EN 1992-2, but previously included in British Standards and other standards and codes of practice.