Then there is indeed a difference in contract law, where the UK is far more focused on the letter of the contract, while European law is more about 'what could have been done'.
In the middle of a pandemic there isn't much we can do against pharmaceuticals. In the mean while has Az delivered more than Moderna until now. So, we should take what we can. Only thing we could blame the EC on is that we should not have based our strategy of vaccinating out on such an unreliable, inexperienced partner with a complicated biological process. Looking back and keeping the Pfizer vaccin European would have been less naive, but we would have started these vaccins wars. Will be interesting what the long term consequences are of having UK and US vaccinated two months sooner. I don't think Europe will forget this.