Analysis: Rishi Sunak could still suffer a similar fate to Boris Johnson. His castle is built on sand

London (CNN) — Rishi Sunak should be celebrating after a week of successes. But despite good economic news, the allies of the British prime minister say they’ve been reminded that his castle is built on sand.

First the good news. The International Monetary Fund said this week that the UK was no longer on track for a recession. Inflation and energy prices are falling, albeit slower than Sunak might like.