The contribution by the right hon. Member for Knowsley (Mr Howarth), a member of the Intelligence and Security Committee, encapsulates some of the challenges and difficulties surrounding the principles of this debate. It is notable that contributions over the past hour have been about some of the principal issues concerning the types of measures that should be available to deal with the threat of terrorism, as well as—obviously and rightly—more detailed examination of the Bill.
We have had this debate on previous occasions, and I respect the view of the hon. Members for Brighton, Pavilion (Caroline Lucas) and for Perth and North Perthshire (Pete Wishart), whose approach has been entirely consistent. In some cases, however, there will be an inability either to prosecute or deport an individual, yet a significant risk will be attached to them—the point made by the right hon. Member for Knowsley. The Government have a responsibility to deal with that risk.
My strong preference would be for prosecutions—absolutely, there are no two ways about it—but that is not always possible for a range of reasons. That is the challenge the Government face in terms of seeing the threat and the risk, and being able to assure national security, as the public and the House would expect. Therefore, reluctantly, a measure is required, and we judge that TPIMs are the appropriate way to meet that risk and challenge. I would prefer that that were not the case—in that I agree with the hon. Members for Brighton, Pavilion and for Perth and North Perthshire—but from the intelligence picture that I have seen and the advice I have been given, sadly and regrettably I believe that TPIMs are necessary to be able to guard national security in that way.
Since April 2010 more than 750 people have been arrested for terrorism-related offences. More than 210 have been charged and more than 140 successfully prosecuted. I say to the hon. Member for Kingston upon Hull North (Diana Johnson) that the introduction of TPIMs was part of a careful and considered counter-terrorism review. She will recall the debates. Consideration was not rushed, but made on the basis of careful analysis of all counter-terrorism legislation to examine the risk and the threat, and what was appropriate and proportionate. That led to a number of changes under the Protection of Freedoms Act 2012, the point that the hon. Member for Perth and North Perthshire was underlining. An assessment was made of which powers were no longer necessary because they no longer added to the protection of the public. That is why we made a number of changes and I was proud to be the Minister leading that Bill through the House. It was part of the process of constantly evaluating and assessing the measures in place in order to consider what is proportionate, appropriate and necessary to guard our national security. In our judgment it is appropriate to make further changes, which is why we seek to bring these measures before the Committee today.
TPIMs have always been part of a package of legislative measures and investment provided to the police and security services to undertake further investigations. That investment will have led to other prosecutions. People who not have gone on to a TPIM have been brought before the courts as a consequence of that investment in capabilities. That is a positive result and something I think right hon. and hon. Members wish to see.
The Terrorism Prevention and Investigation Measures Act 2011 provides a powerful range of measures to manage the threat from terrorists who cannot be prosecuted or deported. TPIM notices are imposed only in cases that require stringent measures, but where they are used, they provide a valuable capability. The Government are committed to ensuring that the appropriate tools are available to our security services and the police for
the protection of national security. That is why clause 12 introduces a new power for the Secretary of State to compel a TPIM subject to reside anywhere in the UK, subject to the restrictions we have talked about in the debate thus far. It is important to recognise the benefits that accrue and that there are safeguards in place. The Secretary of State has to make an assessment to determine whether a TPIM should be granted, why we judge it is human rights compliant and how that view has been upheld by the courts.