Sorry to disappoint prejudices, but haven't read/don't read the DM - I'm going on what the EU are saying themselves and what AZ say themselves etc
Also what possibly could you agree with about the EU?
They are shooting themselves in the foot for future pharma companies - in fact, for all sorts of products.
The reason lots of countries will prefer UK for head offices/ contractual obligations etc is because our legal system is trusted - the EU thinks they can insert "new" export controls on a particular produce when they choose to do so.
Exactly the reason businesses from around the world will choose to deal with UK. Companies will likely be thinking of how to back acking away and leaving EU without anyone noticing in case they change another law to prevent them.