Quarantine and testing may be back on the cards for British travellers who don't get a booster jab.
Official sources confirmed ministers are considering a change in regulations that means travellers entering the UK without a third "booster" dose of the vaccine would face quarantine and testing when they returned from overseas travel.
The Government updated official guidance earlier this month to say they were "reviewing the implications and requirements of boosters for international travel certification".
Part of this review included "looking at whether and how booster vaccinations could be included in the NHS Covid Pass for travel".
The change does not appear to be imminent but if it goes ahead the UK will follow in the footsteps of countries like Croatia, Austria and Israel who have imposed time limits on vaccination validity.