The Sun haven't presented enough data to indicate if the Sun are wrong or right. There's the usual spin and hyperbole, selective quotations from officials.
What is the non-attendance rate at vaccination centres? Do many turn up then walk away because it's not a Pfizer vaccine?
A quick trawl of news sites indicates a lot of English interest in the story but not much traction in EU press, which is odd as they're one of the most effective ways at getting the message out to get vaccinated.
I'm about to combine two of everyone's favourite things on the forum polling and an FT link:
https://www.ft.com/content/1157896c-...c-e59f2752aaac
Indicates vaccine hesitancy predates any conversations around the AZ vaccine.