Interesting bit of information.
Much has been said about EU being slow to approve the use of AZ vaccine. It took them about two weeks. Extraordinarily fast for the approval process for the use of drugs or vaccines.
AZ apply to EU (EMA) for approval 12/01/21
EMA approve its use 29/01/21
It took about two weeks for approval.
But the row about supply from AZ erupted on 27/01/21 only two weeks after AZ had applied for approval.
Were the EU (EMA) slow?
I suspect that if they'd been an quicker AZ would have been caught with their proverbial trousers down.
In contrast. I can't find when AZ applied to UK (MHRA), but UK approved the use of AZ vaccine on 30/12/20, and immediately the UK changed its two vaccine process to 12 weeks. The first dose was given on 4/01/21, and UK have been rushing it out as fast as they possibly could, ever since.
So UK were aware of the potential difficulties in the supply of AZ vaccine as soon as it was approved.
Edit: It looks like AZ applied for approval to UK almost as soon as clinical trials began