//If the R0 number is 3 it means infected people will pass on CV to 3 other people. It’s not wholly accurate...//
The understatement of the year. It is not known how many people currently have the virus; it is not known how many people have had it and suffered either minor or no symptoms; it is not known how many people have had it, suffered fairly severe symptoms (but not bad enough to be hospitalised); it is not known whether or not you can be infected for a second or subsequent time. Apart from that we know all there is to know about it - which amounts to how many people have been hospitalised with it and how many - roughly - have died either with or from it. But it seems we can say how many people on average each sufferer infects (well, somewhere between 0.3 and 3.0 - possibly). A bit tricky, I would suggest, when it is not known how many sufferers there are or have been.
The lockdown and other restrictive measures are being maintained on the flimsiest of evidence, if any evidence at all. It's said that close contact increases risk. I agree with that only because it seems to be common sense. But alternative arrangements will have to be devised soon. For many reasons these current restrictions cannot go on until the illness disappears. Viruses that result in pandemics seem to have natural lifespan of around 12 to 24 months. If the country is to be shut down for that length of time far more people will die for reasons unrelated to the virus than will die from it. The cure really will be worse than the disease. I've seen no indication of that viewpoint being discussed, let alone accepted, and it will need to be debated soon.