The variant of the shot, produced by the Serum Institute of India (SII), is called Covishield and is identifiable by the vaccine batch numbers: 4120Z001, 4120Z002 and 4120Z003.
It is not yet authorised by the European Medicines Agency (EMA), meaning it does not qualify for the European Union’s (EU) vaccine passport scheme.
It is thought up to five million doses of the specific vaccine have been administered in the UK.
The hitch could allegedly leave "thousands" of Brits turned away at EU border crossings when the batch numbers on their vaccines are checked.
