Only people who are waiting for existing applications to be processed (eg from the huge rush before April 2025) or people who have applied before 5 April 2026.
These people will be allowed to pay the cheap Class 2 rate for the past years offered to them up until April 2026, regardless of when the reply from HMRC arrives.
After that, they will only be offered VNICs for future years at the standard Class 3 rate annually if they wish to buy them.