The Times reports that the Home Office has adopted a plan to allow British police to hack into people's personal computers without a warrant.
If true, this is a pretty shocking extension to investigative powers. Apparently it was made possible by an amendment to the Compter Misuse Act 1990 - the proposals included breaking into a suspect's house to install keyloggers and sending emails bearing malware that allows remote access to a PC.
Sounds like Computer Misuse to me.
The BBC have a clear description of the changed policy - "Police 'encouraged' to hack more", and point out some limitations. Malware has got to get past firewalls and antivirus protection, for example,