Reaction to Fire 
-Class 1 is a classification defined by BS476 Pt 7 – Surface spread of Flame. This test measures the distance and time a flame will spread across a surface.
-Class 0 which is a classification defined by BS476 Pt 6 - Fire Propagation test measuring the amount of heat the surface is giving off during the fire.
-Euro Class B is said to be a more robust and common test nowadays than a Class 0 as it measures heat release, fire growth rate, smoke levels and flaming droplets.