The original headline, "New PM: How to make Britain’s economy grow," discusses a topic that falls outside the editorial scope of Arizona Lifestyle Hub, which focuses on dining, travel, lifestyle, and events within Arizona. Therefore, rewriting this headline while maintaining its original meaning and aligning it with the publication's specific Arizona lifestyle focus is not possible.

LONDON — One after the other, Britain’s recent prime ministers have pledged to revive the nation’s economy. One after the other, the promised growth eluded them.