Campaigners have slammed Charles's efforts to remain immune from prosecution calling it an outrage.

Campaign group Republic has said it will be seeking advice on a possible legal challenge to the monarch's immunity. This follows a report in the Guardian that Charles lobbied the Welsh government for immunity from prosecution in relation to the Agriculture (Wales) Act passed last year.

The Guardian report says:

"In the case of last year’s Agriculture (Wales) Act, the monarch was exempted from regulations relating to the marketing of agricultural products, the disposal of carcasses and the disclosure of information to the Welsh state. Police are also unable to gain automatic entry to the king’s private property portfolio under that part of the act."

Speaking for Republic, Graham Smith said today:

"Either we are all equal in law or none of us are."

"It is an outrage that Charles continues to exploit this outdated convention to ensure he's immune from prosecution."

"Charles should be ashamed of himself for demanding unique protections that allow him to bypass legislation farmers, rural communities and everyone else must abide by."

"This convention must be tested in court, it cannot be right that a rule that dates back hundreds of years still protects Charles's private interests and wealth from the law of the land."

"I am seeking legal advice on whether it is possible to challenge this nonsense, and to ensure Charles and all the royals are held to the same standards as everyone else."

"I would also ask why Charles - who claims to be an environmentalist - wants these sweeping exemptions from agricultural and environmental legislation."