The UK's highest court will rule later (Thursday) on whether letters from Prince Charles to government departments should be publicised.
In 2012 the UK Attorney General prevented the publication of the letters, but the Guardian newspaper is challenging this decision at the Supreme Court.
Heir to the throne Prince Charles wrote the letters between 2004 and 2005 to several ministries.
According to the British constitution, monarchs are supposed to be politically neutral.
Maurice Frankel is the director of the UK Campaign for Freedom of Information and believes the so-called 'black spider memos' should be published.
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