UK: Claude-Alain Tardy, the president of Saint-Gobain's gypsum and insulation activities, has warned that a UK exit from the European Union (Brexit) could 'destabilise' the wider European economy as well as impacting the UK market. Tardy made the comments while speaking to Building in Prague and Building News then reported his comments. France and western Europe represented 70% or Euro27.7bn of the group's sales revenue in 2015. The UK will hold a referendum on membership of the European Union on 23 June 2016.