I certainly can give the hon. Lady that reassurance. The House debated this issue. We opted out of much of justice and home affairs but we specifically chose to opt back into the European arrest warrant because it has proved very valuable, not least in the case that the hon. Lady mentions and other cases, in ensuring that terrorist suspects and serious criminals can be returned straight away to Britain. If we stay in a reformed European Union, those arrangements will continue. It is more a question for those who want to leave to say how they will put back in place something as powerful as what we have.