We know that running a business means money is always moving, so it's fine if your combined balance temporarily dips below £10,000 during the day.
To make sure you remain in the draw for that month, you'll just need to top your balance back up to £10,000 or more by midnight (23:59:59 GMT) on the same day. As long as your cleared balance at the end of every day is at least £10,000, you’re all set.