I don't think it needs to be completely wrong, it could simply be someone internally in Pfizer venting off that if the UK would cut that supply it would hurt Pfizer operational results predictions, or simply that it would be noticed in their production, or it's just someone answering "yes" to the questions: "would this be bad for pfizer/vaccines".
Also the frame wouldn't make any sense:
The EU will be controlling exports of AZ vaccine to enforce a company fulfill their contractual obligations (which they have failed completely, several times), and the UK would stop exporting a component for Pfizer? For what? To let it spoil and ruin a UK business that invested and ramped up production to have their production stalled? To hurt their own vaccine supply?
Also the frame wouldn't make any sense:
The EU will be controlling exports of AZ vaccine to enforce a company fulfill their contractual obligations (which they have failed completely, several times), and the UK would stop exporting a component for Pfizer? For what? To let it spoil and ruin a UK business that invested and ramped up production to have their production stalled? To hurt their own vaccine supply?
I really don't see it.