The numbers for England look pretty good but what is sort of concerning is the continuous increase in prevalence in 60s+. Even in London, which has got the lowest 7-day rate across all regions with cases falling, the trend is still on the rise.
Thinking of the next few months, I am actually not concerned about schools (at least, in England). Of course, it is my highly subjective and unscientific opinion but I feel we are likely to have a repetition of the March 8th scenario where cases might go up for 2 or 3 weeks and then start falling. Schools do amplify the spread but they are unlikely to push it up to uncontrollable levels if infections in 18-29s are stable/dropping.
However, a risk of waning immunity in older age groups is something that needs close monitoring.