If we had not left the EU, we would have still been part of the EU's purchasing and approval protocols, the AZ vaccine would not have been approved for use in the UK until today! How many lives will have been saved since being out of the EU we started using it 5 or 6 weeks ago and have probably dished out 4 or 5 million doses.
I think that's what's peeved them off the most.
Though officially brexit had nothing to do with it according to the Eurocrats.
Our government have made a huge number of cock ups over the past year. It's nice to see something good they've done for a change