I don't want to send my Y6 DS either.
I'm 52 and DH is 61 (we're the age of the grandparents of many of DS's classmates LOL) with some health issues although not the 'official' ones for shielding. We have been being hyper cautious. I'm damned if I'm going to throw that away by risking infection via school, or risk DS's health especially as I know that the parents of at least two classmates are NHS or similar and will have been exposed due to lack of PPE.
I really don't understand all this talk about Y6 being such a crucial year. Sats have been cancelled. The final six weeks of the term would have been mostly 'fun stuff' like plays and parties, none of which can happen with social distancing. There is literally no other reason for Y6 to be in school except to do transition days, which our HS have a very sensible contingency plan for anyway.
We should get an opt-out if we really don't feel comfortable sending them back! DS is ready for high school NOW, not in four months time, and he definitely doesn't need to risk all of our lives for the sake of an extra pointless six weeks at his shitty primary.