Actually that is not what was said at all. I watched that broadcast. Dr Chant confirmed authorities hadn’t been able to definitively confirm (thats is very different to ruling it out) the limo driver was patient zero, but his genome sequencing matched that of the Delta variant that had been recorded in the US.
Other countries dont have the same test regimes for air crew, so we may never get a test result to provide an exact link to an individual, but that doesnt mean they were not the source.
“Obviously at the beginning when we have a diagnosis in someone who transports flight crew, I think that it is reasonable that we would make that assumption, and that is probably on strong epidemiological grounds, that that is likely to be the hypothesis,” she said.
When asked about the limos driver claim that he caught it at the cafe, Dr Chantt gave it no credence and that he should come forward if he had extra information to share but they had not found in any of the testing done here an earlier genomic link than the drivers.
You need to remember at that time the driver was being threatened with legal action so in his interests to circulate another theory to cast doubt on where he got to dflect from not wearing PPE, being vaccinated or testign regularly.
The flight crew remains the assumed source.