A succinct introduction to regulatory capture, erasing sex by stealth in government guidelines and the unhealthy relationship between civil servants and pressure groups.
She describes how a dry, technical area such as the Census cannot escape the undemocratic mission creep. She tells us how it was done, and who was left out of the consultation - even experts like statisticians - in case the project bumped up against a dollop of reality.
As ever, she gets the tone just right. She's a star.