Once they have vaccinated all the vulnerable adults, and add the teaching staff to the priority groups, then why can they not return? Does it matter if they transmit it between pupils and parents if all the vulnerable adults have been vaccinated?
And yes they need to relax the meeting outdoors rules, or allow outdoor sport. It is very difficult for children with no siblings to not see any other children for months at a time (or even those who have siblings but quite frankly want to see some other kids). As an adult I can go for a run with a friend, but my primary aged DC obviously can’t go out unsupervised.