therearetwodifferenttestmethods,whichcanbeutilisedtodeterminethetoxicfumesproducedfrommaterialstobeplacedonpassengercarryingtrainsintheUK.Thetwodifferentmethodsareasfollows:·BS6853AnnexB.1–Massbasedtestmethod(utilisingthemethodologygiveninNFX70-100)·BS6853AnnexB.2–Areabasedtestmethod(utilisingthemethodologygiveninprEN2824,2825and2826andtheheatingarrangementdetailedinBSISO5659-2)BS6853AnnexB.1isutilisedforMinorUseMaterials(Tables7and8ofBS6853:1999),Textiles(Table11ofBS6853:1999)andCables(Tables13and14ofBS6853:1999).BS6853AnnexB.2isutilisedforSurfaceMaterials(Tables1,2,3,4,5and6),SeatTrimMaterialsandSeatShellMaterials(Tables9and10)andMattresses(Table12).Inthecaseofbothofthesetests,thegaseswhichareanalysedareasfollows:Carbonmonoxide(CO)CarbonDioxide(CO2)HydrogenBromide(HBr)HydrogenChloride(HCl)HydrogenCyanide(HCN)HydrogenFluoride(HF)NitrousOxides(NOx)SulphurDioxide(SO2))