I have just come off the phone to OFSTED
If you work with an assistant you can not leave children over the age of 5 with the assistant
This is absolutely official
I have had to apply for a variation requesting to leave my own DD (aged 11) with her G'ma (my assistant) at my house if I am out
Confused you will be
So we can leave the most vulnerable children under 5's with lower qualified staff but not less vulnerable ones (eg over 8)
Bizarre