As it stands, that message from the StepChange website is out of date. If I understand the effect of the CAA Operational Directive, it will prevent the use of any UK-Reg Pumas and variants offshore, if they have the relevant part number shaft.
The "Step Change" party line is really just the view of the offshore installation operators. It is clear they wanted Puma shuttles to resume with limited restrictions. I wonder whether this will change, in the light of the CAA action?