The UK government on Wednesday added Covishield, the Indian-manufactured Oxford/AstraZeneca Covid-19 vaccine, to an updated international travel advisory.

The move follows widespread condemnation of the Serum Institute of India manufactured vaccines not being included in a list of eligible Covid-19 vaccines recognised under Britain's reviewed international travel norms, effective from October 4.

The updated advisory means that Indians fully vaccinated with Covishield will no longer be required to undergo compulsory 10-day self-isolation at home or declared location on entry to England.

"Formulations of the 4 listed vaccines, such as AstraZeneca Covishield, AstraZeneca Vaxzevria and Moderna Takeda, qualify as approved vaccines," reads the advisory from the UK's Department for Transport (DfT) and Department of Health and Social Care (DHSC).

"You must have had a complete course of an approved vaccine at least 14 days before you arrive in England," it adds.

The move will also mean that a pre-departure PCR test is no longer required as long as vaccinated travellers pre-book a day two test post-arrival in England and complete the compulsory passenger locator form in advance.

The move comes a day after foreign secretary Harsh Vardhan Shringla said India will be well within its rights to initiate reciprocal measures if the UK does not address New Delhi’s concerns regarding London’s refusal to recognise Indian Covid vaccination certificates.

Shringla dwelt at length on London’s refusal to even accept those vaccinated with Covishield “which is a licensed product of a UK company, manufactured in India, of which we have given five million doses to the UK at the request of the UK government”.

Stating that it is India’s understanding that the Indian-manufactured Covishield vaccine is being used in the UK’s National Health Service, Shringla said: “Therefore, non-recognition of Covishield is a discriminatory policy.”

He added that “I am told certain assurances have been given that this issue would be resolved”. He pointed out that India had offered some partner countries the option of a mutual recognition of vaccine certification. “These are reciprocal measures... if we don’t get satisfaction, we would be within our rights to impose reciprocal measures.”

From October 4, the current traffic light system of red, amber and green countries based on levels of Covid-19 risk will be scrapped and replaced with one red list only. However, until this latest update, Indians vaccinated with any vaccines in India including Covishield were not recognised as vaccinated under the UK's eligibility criteria.

The National Indian Students and Alumni Union (NISAU) UK, whose patron Congress Party MP Shashi Tharoor cancelled his planned UK visit in retaliation of the "offensive" rules, was among the many organisations in the UK rallying against the policy that would impact thousands of Indian students.

Delighted that Covishield has now been recognised by the UK government, and that all the lobbying has worked, said NISAU chair Sanam Arora.

"Though the vaccine is now approved, India is not yet in the list of approved countries making it apparent that the 10-day quarantine and all associated rules still apply for other Indian vaccines. We will continue to urge authorities to take this to its natural conclusion," she said.

From October 4, travellers from 17 additional countries with eligible vaccines, including Australia, Japan, Singapore and Malaysia, will fall under the UK's list of recognised jabs of Oxford/AstraZeneca, Pfizer BioNTech, Moderna or Janssen vaccines. The DHSC has said this list is reviewed fortnightly.

Under the new rules from October 4, unvaccinated Indian travellers or those not vaccinated with Covishield must take a COVID test three days before departure and book in advance for two COVID tests to be taken upon arrival in England.

On arrival in England, the passengers must self-isolate in the place they have confirmed on their passenger locator form for 10 days. A privately paid-for "Test to Release" option does exist at day five, which allows an early end to the 10-day quarantine with a negative PCR test.