My DS1 is almost 8, DH is away today (he normally works from home so would be at home to watch DS2), DS2 had a sore ear this morning and was very lethargic etc. I warned DS1 that is DS2 was really ill he might need to walk home from School himself, about a 10 min walk. He has to cross two very quiet roads and then wait for me to help him cross the two busy roads, the point that he has to wait is visible from the livingroom window and I would watch for him, come out (locking DS2 in the house) and help DS1 over the busy roads.
This was the plan in case of an emergency but DS2 has chirped up and is well enough to come on the School run, DS1 however said that he hoped I wouldn't be waiting for him and he would have to walk. I know DH wouldn't be happy with the idea.
As a side note I have been awake since 4am this morning and can't think straight, although I think DH not being happy with the idea should probably swing it.