Alien Getaways

 was a company that advertised interstellar travel to a variety of species.

A brochure of theirs once arrived in the Doctor's TARDIS advertising Gardens of Everlasting Summer with the caption, "Aged over 660? Time to take things easy" and several photos. Inspecting this at Dan Lewis's insistence caused the Thirteenth Doctor to become suspicious about the seemingly unchanging flowers in the photos. (COMIC: The Everlasting Summer)