I largely go along with your view in that post, but on this point, the London figure includes asymptomatic, since it comes from the ONS' Infection Survey (another update will be released today) and that samples a large cohort of 120,000 people in the community on a regular basis, whether sick, well or in-between - not those in hospitals (etc) though. The figure can't be relied on since even with 120k people in the survey it is only throwing up a low number of cases. My own view is that there probably aren't many people with Covid19 flying on BA at the moment, given the catchment area, but we all need to work to keeping it low.