Guardian article
"Ministers were prepared to pay a few hundred million upfront, allowing the company to build its first virus manufacturing process, and the UK government to demand its citizens be vaccinated first.
“That underpinned all of it,” an industry insider said."
So the UK is doing vaccine nationalism and AZ probably did two contracts, with colliding obligations.
And just as a thought:
The US is probably doing the same, so the EU and its production sites are providing not only their own citizens, but also the vaccines for the rest of the world that has no access to vaccinees ( and in fairness Russia and China, not sure about India).
So the UK has the high ground in this debate?