Sark's Chief Pleas governs neighbouring Brecqhou

The Telegraph group owners, who live in a cliff-top castle on Brecqhou, say the island should not be governed entirely by Sark's parliament, the Chief Pleas.

Their concerns were started by Sark's refusal to allow one of their daughters inheritance rights.

Now they want to set up a group with Chief Pleas to resolve the dispute.

The Barclays have put pressure on Sark to change its laws

Sir David Barclay said in a letter to all members of Chief Pleas: "Our disagreements began because we want to leave Brecqhou to our children collectively.

"We questioned Sark's jurisdiction over Brecqhou because we believe there are historical grounds for saying that Brecqhou is not part of the fief of Sark."

He added: "We believe if Sark intends to govern day-to day activities in Brecqhou then we can insist it complies with the European Convention on Human Rights."

The Barclays have already put pressure on Sark to end feudal laws which allow landlords an automatic right to sit on the Chief Pleas.

He outlined their objectives: