Limitations for sure, especially geography and density.
Nationwide lockdowns shouldn't necessarily happen in a country the size of the UK. That's a failure in test and trace. Outbreaks happen in enclaves, regions, small communities then spread. This is what Italy tried to solely lockdown without testing so they had no idea the scale of what was happening.
UK shouldn't be considering everywhere opening back up in sync in my opinion. If we had the data you could open the lower risk areas. It will certainly be the case that some towns and cities are currently unnecessarily locked indoors and others don't need another 2 months of lockdown.