If vaccines will be mandatory, then loads will miss out on this too, and how fair is that?
(And not just for doing this. In general.)
The 2-night version sounds amazing to me, but when both me and my partner are last on the list to get a vaccine...
So testing would sound like the "go-to" thing.
And then, which test will be valid, as I've heard loads from people travelling by Euroshuttle or Eurostar, that NHS/antigen tests aren't valid, it must be one you payed for, so another cost to add, so that's another thing they'll have to be very clear about.