Yes.
Only the new exams may be taken after 31 Aug; however, unless you have passed
both Navigation
and Flight Performance & Planning
before 1 Sep, you will have to take them again. This is because certain syllabus items have been moved from one exam to the other - there's nothing new in the actual syllabus content. All other passes of the old exams will remain valid for the normal time period.
It seems that the new 9 exams include a total of 172 questions - so the CAA has gold-plated the EASA requirement to the tune of an extra 43.3%....
