The AstraZeneca jab batch numbers which may prevent Brits that have had it from holidaying in the European Union have been revealed.
Some Brits may be excluded from travelling to EU countries because certain batches of the Covid vaccines aren't recognised by the EU's passport scheme.
The issue is with specific doses of the AstraZeneca jab that was made by the Serum Institute of India - known as Covishield.
Now the batch numbers of the vaccine have been shared.
Despite it being the same as other AstraZeneca doses, the jab has not been authorised by Europe's regulator and is therefore not recognised by the EU.
Those who have had Indian-sourced doses of the vaccine could get flagged at the EU border.
Have you been vaccinated with a jab in this batch number? Contact us at webnews@mirror.co.uk
Which batch numbers are affected?
The EU Digital Covid Certificate has now come in to allow people to travel without needing to quarantine.
But the certificate will not recognise the Indian-made AstraZeneca batch numbers 4120Z001 , 4120Z002 and 4120Z003 .
The numbers are noted on the NHS app.
Jabs that are EMA-approved include Pfizer-BioNTech, Moderna, Johnson & Johnson, and the Oxford AstraZeneca jab manufactured in the UK or Europe, which is sold under the brand name Vaxzevria.
“Entry into the EU should be allowed to people fully vaccinated with one of the vaccines authorised in the EU,” a European Commission spokesman told The Telegraph.
“Member states are… not required to issue certificates for a vaccine that is not authorised on their territory.”
Batch numbers are the only identifier for who has had these specific jabs as British authorities have used the brand name Vaxzevria on all medical records where the AstraZeneca vaccine.
Why are the Indian-made vaccines not allowed by the EMA?
The Indian-made vaccines are not allowed by the EMA at the moment because no licence has been sought for them yet.
This decision has been strongly criticised in India with its foreign minister and the chief executive of the Serum Institute of India having reportedly raised the issue with the EU.
It is a similar problem for UK travellers to the US where no AstraZeneca jabs have yet been licensed.
What has the JCVI said?
Professor Adam Finn, from the Joint Committee on Vaccination and Immunisation (JCVI), said people should not be concerned about receiving doses of AstraZeneca vaccine manufactured in India, and that the issue with the EU was "an administrative hurdle".
"The most important part of this is that people who have received these batches should be reassured that they have received exactly the same stuff as people who have received other batches made elsewhere," he told the Today programme.
"This is an administrative hurdle that needs to be straightened out but people should not be concerned that they are in some way less well protected.
"We're in the early days of this new world of needed vaccine passports and there are lots of aspects of this that are still being sorted out for the first time.
"But it's clearly, ultimately not in anyone's interest, including the European Union, to create hurdles that don't need to be there."
He added: "I would anticipate that this will get straightened out in due course."
Covid passports?
The EU is rolling out its certificate scheme so people travelling can prove their vaccine status so they don't have to quarantine when crossing borders.
Britain is currently in talks with Brussels around easing travel restrictions between the UK and the continent. EU sources have described how discussions are going in the right direction.
They said it was not yet clear whether the UK will use the NHS app or another in order to display vaccination status.
But a UK Government spokesman said the app will be "a key service" as international travel is reopened and hinted at a possible mechanism to ease the Covishield issue.
"All AstraZeneca vaccines given in the UK are the same product and appear on the NHS Covid Pass as Vaxzevria," he said.
The NHS app is already being accepted by individual countries including Spain and Greece.
What has the European Commission said?
A European Commission spokesman said that "entry into the EU should be allowed to people fully vaccinated with one of the vaccines authorised in the EU".
He added that individual member states could also allow entry for people vaccinated with jabs on the World Health Organisation's emergency list.
"This is the case for Covishield which is not authorised for placing on the market in the EU," he added.
