The position of Deputy Prime Minister is not recognised in United Kingdom law, so any post-holder must be given an additional title in order to have legal status and to be paid a salary additional to the parliamentary one.
副首相的职位在英国法律中未得到承认，因此任何职位持有人都必须获得额外的头衔，以便具有法律地位，并获得额外的薪水。