Ofsted doesn't require you to do your own deep dive
This is because Ofsted's subject deep dives help inspectors consider the effectiveness of your curriculum in a specific timeframe.
Ofsted says there are probably better ways of assessing your own quality of curriculum than doing internal deep dives. You can see your curriculum in more detail and as an ongoing conversation.
If you'd like to carry out your own:
Use your deep dive as an opportunity to find out if you have a robust curriculum plan that you're delivering in practice.
Who's involved: the phase/subject/department lead and the staff members that teach that phase/subject. This is a collaborative effort that shouldn't feel like