Just to say that from today 19/11/21 Covid Boosters and third doses will appear on the COVID Pass in England, making it easy for people to show their vaccine status when travelling abroad.
https://www.gov.uk/government/news/boosters-to-be-added-to-nhs-covid-pass-for-travel
NeilThompson
I noticed the bmc insurance now covers covid related cancellations and losses but not if you're travelling with an unvaccinated person, other than for medical reasons. Have a close read !