After criticism for the recent travel advisory that prescribed 10 days quarantine for fully vaccinated Indians, the UK's new advisory has accommodated SII's Covishield as an approved Covid-19 vaccine, however, double-vaccinated Indians still have to quarantine because of "vaccination certification issues", according to UK officials. The Indian and the UK government are in talks to resolve the issue.

As per an NDTV report, officials have implied the problem is not Covishield but doubts over vaccine certification in India.