This last week, another rapid covid–19 test hit the fan. The story is becoming boringly familiar. A company announces a new covid–19 test, and puts a high gloss on the test’s performance. Ministers respond by placing large orders. Later, it turns out the company has been polishing a turd, as real world studies show the test’s performance is, err, crap, and ministers find that instead of getting more bang for their buck, they have got more crap for their cash. Such are the rewards for ministers who admire their reflections on the faces of polished turds. What made this particular turd/fan disintegration situation more notable than some is the suggestion, made by the BMJ and denied by the DHSC, that the government had known all along it was buying a polished turd, but deliberately suppressed the information, because it would get in the way of procurement.