This happened to me, namely the embassy aren’t exactly prompt in dealing with urgent issues. You need to email the Ministry of Foreign Affairs, as I flown from the UK I emailed:
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The correct email that corresponds to your application will be at the bottom of the email where your CoE application was approved.
State it’s urgent, attach your new flight confirmation, current CoE and passport photo page for verification. Also, don’t forget to speak to your ASQ about moving flight times/dates first.
While many here would encourage you to take a risk, it is your responsibility to ensure your documentation is correct! My changes were made in the space of 10 mins after my email, so I wouldn’t worry about waiting a while for it.
I can agree. Tested at the Liverpool clinic at 9am and received my result 5pm the same day. Super quick and easy and states RT-PCR on the test certificate.