A Clarence House Spokesperson said:

"The correspondence published by the Government today, Thursday 4th June, shows the range of The Prince of Wales' concerns and interests for this country and the wider world. The seventeen letters (six from His Royal Highness, eight from Ministers and three from Private Secretaries) were written between September 2007 and June 2009. 

This is the final release of material related to the Supreme Court judgment. The Guardian put in two separate requests for letters, before the FOI act was amended. The conclusion of the first request resulted in the publication of letters last month. The other request was stayed whilst the first case went through the Supreme Court. In light of that judgment, the Government has now decided to publish the second batch of letters.

The letters published by the Government show The Prince of Wales expressing concern about issues that he has raised in public like affordable rural housing, the quality of hospital food,  the preservation and regeneration of historic buildings, an integrated approach to healthcare, climate change, and others.  In all these cases, The Prince of Wales is raising issues of public concern, and trying to find practical ways to address the issues."