GazC I share your concerns. We have a 9 year old due to return to school shortly. Our local LEA is allowing parents to make the decision about their children going back, and we at least have another couple of weeks to make a decision as my daughter won't return until towards the end of June. Still it is a worry.
The upturn in this Kawasaki like disease simply illustrates how little we know about the covid virus and it's long term effects. We may end up with a generation who barely noticed the virus and in later life we see large swathes of the population sufferring from lung disease later in life given the scarring that can happen to peoples lungs.
Goves assurances on the Marr show yesterday did't particularly ease my worries. He avoided some of the questions, and, probably correctly said he couldn't garuantee school safety. He did keep pointing to no know outbreak of covid in schools, which does give some level of assurance, but he doesn't really know what he is doing, in my opinion. They will return our children to school and monitor the R number. Not sure I am prepared to let them do that with my daughter.
Some people will have no choice, and I feel your worries. I am just lucky enough to be able to make the choice myself.