SOP of this Government is to drip feed stuff to the press, see what reaction there is- then proceed on the hoof. A bit like the pre testing on arrivals, then forgetting to set a specific date, then forgetting to add the specific test(s) acceptable. All in all, the usual Capt. Mainwaring approach.
On the jabs, for European destinations- it'll be overseas countries that'll decide if tourists are welcome or not- regardless what the UK says. As for the long haul, there isn't a cat in hell that Asian countries are going to be welcoming Brits anytime soon- jabbed or not.
(Kind of makes the Ryanair Jab & go Ads rather silly)