It is clear that the EU was slow to act in ordering the vaccines. Whether this was due to its bureaucratic nature and the decision to act as a whole rather than allow its members to act individually, as it did with the various lockdown regimes is something that could well be a factor. There is an element, now that criticism of the slowness of the vaccination programme is starting to come from its members, of the EU leaders wanting to deflect that criticism, and the UK is now a convenient target.
It is possible that, just for once in this pandemic, the UK approach on this issue has been quite successful, but sadly I feel we are now starting to see a continuation of the "UK bad...EU good" narrative on this forum.