What’s everyone’s thoughts? 4 storey block of flats, one escape stairs, all flat entrance doors open onto an external open walkway, all doors and windows are uVPC, walkway width is 1.2 meters should all doors be FD 30 fire doors and glazing FR30?

If you follow the longstanding and current guidance for existing blocks, then FD30 doors and glazing fire protected unless the bottom sill is 1100mm high or greater.