Is there any reason you think it should extend the notification period?
Thanks for the information
A SOPO should generally run in tandem with the notification periods but that doesn't extend the notification.
All that does is give you a ground to challenge the SOPO although it is fair to say that there are SOPOs that last for life.
Now the new orders are in force there will be human rights challenges in any event afresh.
Hope this helps. Please let me know if you need more information.