A recent re-definition of the base of the Tournaisian at the base of the Carboniferous and a revised correlation of the base of the Chadian Stage with the base of the Viséan allows the re-adoption in Britain of the Series name Tournaisian, which was not used in the Geological Society's Special Report on the Dinantian (George et al. 1976). In addition, the two Belgian Tournaisian stages Hastarian and Ivorian can also be recognized in Britain and their use is recommended. The regional stage name Courceyan becomes redundant. 4 new biozonal names are proposed.