So devolved nations agree on the Christmas "bubbles" between 23rd Dec until 27th Dec. After 2nd Dec, there will be no travel restrictions within England, so people can go on holiday, therefore travel to whichever airport they choose. But Wales still insist travel abroad is not allowed, therefore no holidays abroad, so for me who lives in North Wales (20 miles from border), I could visit family/friends in Cheshire but I can't go a few miles further inland to Manchester Airport...so no complete agreement on the travel situation overall!
This is the way I am reading it...please correct me if I'm completely or partial wrong.