 Dicey 's opinion that any action of governance by the monarch beyond statute is under the prerogative <unk> from Blackstone 's that the prerogative simply covers those actions that no other person or body in the United Kingdom can undertake , such as the dissolution of Parliament . Case law exists to support both views . Blackstone ’ s notion of the prerogative being the powers of an exclusive nature was favoured by Lord <unk> in the De <unk> ’ s Royal Hotel case of 1920 , but some difficulty with it was expressed by Lord Reid in the <unk> Oil case of 1965 . A clear distinction has not been necessary in the relevant cases , and the courts may never need to settle the question as few cases deal directly with the prerogative itself . 
