Terrorism prevention and investigation measures bill

I thank my right hon. Friend for giving way; she is being generous with her time. If there is a threat, it must obviously be dealt with, but does she not accept that one deals with threats by using the law, in particular the criminal law? We do not always descend into special measures such as those that we are discussing, which have a dangerous tone to them of the unaccountable power of the state against an individual. Does she not accept that it is important to stick to the principles of the criminal law and not endlessly go off into special laws?