Party centralisation, internal cohesion and leadership security: How UK prime ministers compare to Japanese prime ministers

This article considers UK prime ministers as leaders of their political parties. It evaluates the extent to which three trends identified by Uchiyama in this issue, relation Japanese ministers, are replicated case ministers. First, what is trend towards increasing party centralisation within Labour and Conservative parties? Second, reduced factional influence lower rebellion rates Finally, association between leadership personalisation security – i.e. how an approval rating below 30 per cent will act a trigger for removal incumbent minister