I went to a presentation at my ds's school for parents of children moving from pre-school into reception. One of the first slides shown had the comment "From the age of 5 children are legally obliged to attend school" (I may be paraphrasing a bit, it may have said parents are legally obliged to send children to school). I pointed out that they had to be educated from the age of 5.
Most of the parents there were (like me) not British and it's possible that they didn't know that there is no legal requirement to send a child to school. Equally I'm pretty sure that most of them (again like me) probably wouldn't want to home ed.
Did I do good, or was I just a bit rude and picky?