Alone07 - I am a single mum to 3 dc with ASD. If either my eldest (due to severity of need) or youngest (due to age - only 7) need to be isolated, then I would have to stay with them, so no one going to school. If it is my middle child needing isolation, then depending on how ill she is, I could leave her while taking the others to school (which is current advice, I think - only the ill person self isolates).
Likelihood is that if any of us need to isolate, then we will all isolate. Logistically, it doesn’t work very well any other way, as can’t leave oldest or youngest alone anyway. Due to our situation I have a reasonable store of food (NOT a stockpile - have always had a good store of food since the time a few years ago when I couldn’t leave the house for about 3 months due to various combinations of ASD issues - instigated rigorous freezer storage and rotation since then, always have flour/yeast for bread, tins of fruit etc) so isolation for all of us would just about work (apart from cabin fever!)