I have had the privilege of completing the two-year fire service parliamentary scheme, which Sir Ken Knight helped to set up. Being placed in a live carbonaceous fire with breathing apparatus, I had a small introduction to the horrors of fire and the bravery displayed by our firefighters every day of the week. Fire doors are absolutely crucial. What puzzles me about this inquiry and the statement is: who certifies that these doors are meant to last 30 minutes, if it has been demonstrated that they last half that time? Fifteen minutes may not seem very long to us in this Chamber, but for the people who are trapped behind the doors and can see fire through the glass, it is crucial. Who certifies the 30 minutes?