1. Is probably something to do with the publication dates of the "Romford Recorder".
2. The link I provided is to the "Romford Recorder's" public notice section. I believe TfL must advertise their proposals in the local press before making any orders, so that was the required notice of their intention. You would have to search TfL's traffic orders to see if it was actually made. I cannot imagine TfL would implement such a major closure without the required order.
3. Don't know.
4. The proposal says the order will last until 31st March 2026 (or when the works have been completed, if sooner).