As of today 3rd May 2015, The Computer Misuse Act 1990 has been amended to include a life sentence in section 7
…an act causing or creating a significant risk of
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serious damage to human welfare of the kind mentioned in subsection (3)(a) or (3)(b), or
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serious damage to national security,
Also earlier in Section 2
Damage is of a “material kind” for the purposes of this section if it is—
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damage to human welfare in any place;
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damage to