Traceback works when the sick people ate at one place that bought from one supplier. UKHSA's implicated venues were cafes, restaurants and takeaways, and some of them were running eggs from more than one supplier at the same time [7], which is part of why an investigation opened in May [3] has produced a channel rather than a consignment, with no exact source identified and no evidence against British eggs or poultry [8], roughly four months in [20].
The count is still moving. Set 259 confirmed as of 25 August against 207 as of 13 August [1][2] and you get 52 more confirmations in twelve days, a shade over four a day [15]; on 259 the single death is 0.39% [17], and the 38% hospitalisation share [4] implies something like 98 admissions [16]. This is probably wrong, but a hospitalisation rate that high among laboratory-confirmed cases usually says more about who gets a stool sample than about the strain itself, which would make 259 a floor on exposure rather than a measure of it. The two bloodstream infections, one fatal [5], are the tail the Food Standards Agency's earlier risk assessment already flagged for vulnerable groups [9].
For scale on what a single egg channel can reach, the Korean figures in the same file are the cleaner arithmetic: 14 egg-linked outbreaks produced 2,392 patients [12] against 319 outbreaks and 9,780 patients across all causes [10], which is 171 patients per egg outbreak versus 30.7 overall, call it 5.6 times the size [18]. Eggs concentrate, because one consignment touches a great many plates before anyone presents as ill. Korea's salmonella patient count went from 1,561 in 2021 to 4,248 last year [13], so the direction of travel is not a British peculiarity.
Which makes this a procurement-structure question for any multi-site group rather than a hygiene one. Keep three egg suppliers and you keep price tension between them; keep three and you also forfeit the ability to say which egg went into which brunch, and the hours a kitchen manager spends reconstructing delivery notes are hours not spent on anything else. What would prove the thesis wrong is straightforward: UKHSA or the FSA names an importer and a lot, a withdrawal goes out, and this reverts to one supplier's failure, with documentation spend revealed as a premium on a risk that had a name. The duller counter-thesis, and possibly the right one, is that imported eggs are cheap enough that operators absorb the tail and change nothing. We have no price in this record for imported versus documented supply, so anyone quoting a cost per cover for switching is guessing.
One caution on the calendar. The September peak of 45 outbreaks and 1,475 patients, and the July-to-September clustering attributed to temperature and humidity, are Korean observations [14], not British ones. That argues for checking storage temperatures before it argues for repricing a contract.
