If you're one of the 12-weekers - shielded or otherwise vulnerable - what happens when the time is up? Do you believe that it's then safe to rejoin society? Will you extend your own personal lockdown?
Triggered by the schools thing. Teachers who felt they had to self isolate meant that schools had no choice but to partially close even before they were ordered to. Time is up at the start of June. Will they feel safe to return considering social distancing? There must be other examples outside of schools.