One of "subsidiarity", namely that decisions should be taken at the lowest levels possible, and the "margin of appreciation", namely that national governments should have greater leeway in applying the judgements of the court.

BBC: UK presses for European human rights convention changes

He said a "clear and codified" bill would allow the European Court of Human Rights to apply a "margin of appreciation" in its rulings - where judges are obliged to take into account the cultural, historic and philosophical differences between Strasbourg and the nation in question.

BBC: David Cameron: UK human rights law review 'imminent'