A blackout imposed on letters to ministers from meddling Prince Charles was yesterday overturned by the second most senior judge in England and Wales.

Lord Dyson said there were no "reasonable grounds" to keep secret 27 letters sent to six government departments between September 2004 and April 2005.

Tory Attorney General Dominic Grieve had denied a request for access to the letters by Guardian journalist Rob Evans under the Freedom of Information Act.