"Its mandate, or at least the committee's interpretation of its mandate, requires it to perform little more than a proof-reading function, " Ms Crowe said.

BBC: Guernsey's Royal Court building

The exception would be when "a national court has manifestly made an error in its interpretation of the convention", or if the case "raises a serious question about the way the convention is interpreted or applied".

BBC: UK presses for European human rights convention changes