The hon. Lady is right to say that this is an important issue. She will be aware that the case to which she refers within the House of Commons is currently subject to a Health and Safety Executive investigation, and I expect the result of that to be made public once it has concluded. I assure her that House of Commons teams working in those areas take such matters seriously, and a number of procedures are in place to try to prevent such a leak again. Once that investigation has concluded, I am sure that any recommendations will be fully implemented, and we can be assured that those working and operating as contractors in this building are safe.