This Snopes article says it's real, citing this Telegraph article (archived version) that features another photo of the same troops. What's weird is that the articles tell slightly different stories. The Snopes article says the original photograph's caption describes it as a Christmas charity performance, while the Telegraph article says they were doing a drag show to entertain themselves. Still, the photos seem to be real.

edit: not even a minute late, but still late :c

https://feddit.de/comment/1299543 here i posted a ramdom somewhat reliable source. Context is given in the other comments there