首相對內閣環繞有效討論、行政權力上支配立法議移嘅操控能力等結合效果，令英國首相嘅權力比作為一位行政主導首長。therelativeimpotenceofparliamenttoholdthegovernmentofthedaytoaccountisoftencitedbytheukmediaasajustificationforthevigourwithwhichtheyquestionandchallengethegovernment.