Re: Meanwhile in the UK...
"rigorous enough to be identifying the majority of COVID-19 infections in a quick enough time"
And we are not likely to get that sort of coverage within a useful period of time. The best national coverage to date is Iceland, at 10% (the denominator is low). In a country with a sizable population, testing capacity will have to be huge since periodic retesting will have to be done. Last week, I may have tested negative. But since then, someone coughed in my face.
A more reasonable goal would be to test across a random sample of the population. A large enough sample to be statistically meaningful for epidemiological studies. But set aside the unreasonable goal of testing and retesting even a significant fraction of the population. The statistics will give the authorities what they need to know to lift travel bans and open up businesses while keeping an eye on the disease spread. All that will be needed is to pry a certain amount of the test capacity away from the VIPs.
And finally, the long term outcome of this pandemic is that practically everyone will get the disease. A few will die. Others will be immune or asymptomatic. Some will get a nasty cough and fever. Some of these will require hospitalization and maybe an ICU. But they will recover. All that needs to happen is to keep the treatment rate at a low enough rate so the number of cases at any time doesn't overwhelm the system until a vaccine is developed. Then, testing will no longer matter, as it will be treated much the same as a flu shot. Everyone gets one.