You've surely seen my other post on this, with the direct quotes?"they don't have a leg to stand on" should never really be followed by "they signed their deal..."
They either have a deal by which AZ said they'd deliver something by a certain point (and therefore they have a leg to stand on) or they don't. When they signed the deal is not (and sorry for repeating myself) as important as what AZ said they were going to deliver and when. This is something we don't know, and won't until the contract is released.
If AZ said they'd try for 100m doses by Q1 2021 - and remember even AZ haven't denied saying that, just said it was an aim rather than a legally enforceable part of the contract - then AZ should be held accountable when they can't deliver it. In any other business or walk of life, except it seems British politics, making claims you cannot deliver on is something you should be criticized for.
All this talk about not being as quick as HMG to sign up, or delays due to EU central bureaucracy, or whatever is not relevant; it would only be relevant if AZ had said originally that they only have capacity for 40m because the rest of the capacity had already been contracted out to the UK or whoever.
I don't see how you can say all of the rest is irrelevant?
The UK deal with AZ seemingly (because obviously I haven't seen it for sure but going off direct quotes) explicitly outlines that the UK factories must not be used for any other purpose than the UK dosage until AZ have fulfilled their initial UK order.
So no, the EU simply do not have anything to go off because that deal was signed with the UK well before AZ signed their 'best effort' deal with the EU.
The EU have no right to demand anything of the UK factories, just like if the EU signed their deal with Moderna first, then Moderna's priority will be to deliver their vaccines to the EU over the UK. Again, it depends how the contract will be worded and yes, we don't currently know for sure, but I doubt the AZ CEO would so publically lie when directly quoting the contract.
I actually think, if you read the piece, then there's plenty of times that the AZ CEO accepts responsibility and criticism. He even says 'it's not enough'. But there are evident reasons for that. I also think it's right for the EU to be miffed, but they don't have any right to demand AZ start sending vaccines their way just like we wouldn't if it was the other way round.