My hon. Friend is absolutely right that it is a balance. We live in an open and free democracy. We want members of the public to have access to their representatives and to this place, and for Members of this place to have easy access to it. That is part of how we operate. It is important, as we look ahead and ask whether anything more needs to be done, to recognise that we should not in any way destroy the values that underpin our democracy, because if we do that, as he says, the terrorists will have won.