From government to Premier League clubs, Britain’s incoming CEOs enjoy a brief honeymoon that fuels optimism. Seven FTSE 100 stalwarts have already appointed new chief executives, and another five are slated for 2025. At Diageo, Sir Dave Lewisบุ has slashed cost targets by half, raising shares 6 % after announcing a $1bn cut over three years. The rapid move reflects shrinking tenures and the pressure from activist shareholders and hostile predators.

Cindy Rose, who took over WPP last September, has focused on cost‑cutting and AI investment, but revenue remains weak; the stock fell 60 % from December yet rallied 27 % on new client wins. In contrast, GSK’s Luke Miels balances cost cuts with acquisitions to offset a looming patent cliff in its HIV portfolio, targeting £40bn revenue by 2031. Poorly managed transitions can erase nearly $1 trillion in market value, according to a U.S. study.

Internal appointments ease change, as evidenced by HSBC’s Georges Elhedery, whose shares have risen 130 % under his leadership. Investors reward the newcomer bounce, but the margin for error has shrunk.