Dr Julian Lewis: Will the Leader of the House arrange for the Home Secretary to come to the House to resolve an apparent contradiction between two answers he gave to questions about whether the Security Service is or is not continuing to monitor subversion? On 21 June at column 783, the right hon. Gentleman cast doubt on my assertion that the Security Service was no longer monitoring subversion, but in a written answer yesterday, he asserted that what was said in his Department's booklet about MI5 was still valid--namely, that the Security Service is currently undertaking no investigations into subversion. In view of the failure of intelligence about the riot in the City, which the Home Secretary acknowledged was thought out in advance in a conspiratorial way, is it not important that the House knows whether MI5 is still doing its job in that vital respect?