Mr. Eoin O'Dowd:

The technical guidance document provides the prima facie guidance that the whole wall build up from the outermost face to the innermost face, with the exception of specific elements, must achieve that reaction to fire classification. However, there are also methods of proof of conformity for such systems, termed as full-scale fire tests. The technical guidance document does permit a full-scale fire test, provided that these test characteristics are met and that the system provided on the building is the system that was tested and is certified as being such.