I think, logically, that the measures taken should correspond to relative population densities. If you look at map as that identify where infection rates are highest i.e. generally in urban areas. Rural areas, such as Cornwall, Devon and Norfolk, tend to have lower rates than the metropolitan areas. I think this is highly predictable due to reasons to do with rates of social contact, use of public transport etc. I think that this should have been predicted from the outset by these so called scientists. All urban areas should have had more severe measures taken against them months ago. It's ridiculous to put, for example, Merseyside and Greater Manchester into different tiers when, probability would suggest that they have the same underlying characteristics.