@Angryrant55 I agree, if they do a partial lockdown, I think you will see people moving very quickly all over the country to get to somewhere else they want to be (e.g. somewhere they are able to look after relatives from, somewhere not in a city etc) and this could be a real problem.
I think if/when it happens, it will have to happen very quickly for it to be properly effective.
I think there will be some people driving out of London now, actually.