It is no simple matter for the House to sit during prorogation, which is one of the reasons for making my statement today. Indeed, it would be unprecedented. Nevertheless, the Civil Contingencies Act 2004 provides a means for the House to sit in extreme circumstances, if there is a threat to the United Kingdom. The Leader of the House will be much more familiar with the details than I am, but I think that my hon. Friend should bear in mind that the threshold for the assembly of Parliament during prorogation is very, very high.