UK has the idea of contempt of court. Even as it stands, the court can demand you submit some evidence - say an encryption key for a document. And if you refuse

UK has the idea of contempt of court. Even as it stands, the court can demand you submit some evidence - say an encryption key for a document. And if you refuse, they can even imprison you until you surrender the key. Another principle is that when someone is destroying evidence, you can presume it contained incriminating evidence. I think you could make the punishment proportional to the presumed crime.