On a much more gradual basis and in a targeted way. To ignore/disregard the damage that complete lockdown might have on hospitality and tourism just isn't an option, because of the secondary consequences on individuals.Policies will facilitate the sort of generational changes in the economy we're talking about, but it'll take time for Britain to disengage from a service sector dominated economy, or at last diversify a bit more. Many parties since the 2008/09 crash have talked up the 'retooling' of the economy but it'll come incrementally.
You might save more lives, but you can ruin many others.