Return flight more than 60 days after departure

[LisuLover]

Do I need to do anything before I go to Gatwick, London on 24/12, (apart from buying tinsel and a red felt hat) for a business class flight with Emirates to Bkk that has a return date of 10/03/25?  It’s over 60 days and I’m wondering if Emirates will allow me to depart? 

[Goethe]

To be perfectly safe, buy a cheap ticket to a neighbouring country. There is no point in taking a risk, since the "insurance" of an onward flight is so cheap.