There is a live police investigation going on. The hon. Gentleman should appreciate that it is an independent criminal investigation by the police, and it would not be appropriate for me to talk about certain things publicly, unless he is suggesting that we should jeopardise a live police investigation.
The hon. Gentleman rightly asks about the investigation —not the police investigation, but the work being led by the expert panel—and I am happy to give him more information. There is a documentary investigation into the fire doors, led by the police, to see whether it is a whole set of fire doors or a certain batch and where they might be in the country. There is a fire testing investigation taking place, led by my Department, to test a whole number of other doors to see how widespread this problem may be. There is also a visual inspection and declassification investigation going on into the materials. I hope the hon. Gentleman will appreciate that there is a lot of work to do, and it is right that we do this thoroughly and take the time to get it right.