Staircase that goes to top level is classed TR2 meaning EI60 on doors and fixed windows. (doors should be EI30-c)Other 2 staircases is E15 door and fixed window.On level 2,3,4 there is 2 modules marked blue with window and doors in EI30.On level 5 there is one module marked blue with window and door EI30.On level 5 yellow marked text is only regarding roof.