Many of these advisors are speaking directly to media. Devi Sridhar, one of the advisors to the UK government, for example, has been doing interviews recently about maintaining long-term border closures and requiring expensive hotel quarantines.
Right after I posted my comment above, at 15:12 comments regarding Canadian forecasts appeared in The Guardian's COVID live blog, in which epidemologists say that restrictions must be preserved within the country because the vaccine rollout is a global problem, not a local one.
If you go to Google News, set your location to the UK, and search for "devi sridhar", you'll find abundant content that is not behind a paywall. Here is just one article[0] of many in which she advocates for an approach where borders stay closed until the whole world is vaccinated.
Apparently this[1] is the permalink for The Guardian post.
Right after I posted my comment above, at 15:12 comments regarding Canadian forecasts appeared in The Guardian's COVID live blog, in which epidemologists say that restrictions must be preserved within the country because the vaccine rollout is a global problem, not a local one.