If the regulation of technologists is the safe as with Clinical Scientist then education is not an issue.
When the HPC opened the register to Clin Sci in June last year it also opened a two year window where people could register under the grandparenting system.
In short it meant that people working on the Clinical Scientists B or C grade could apply for registration without having the necessary qualification or formal training. They only need to prove that they are currently working to the required standard and competency.
I assume if registration for technologists is made mandatory then these transitional arrangements will also be made available.