Cutaway universe

During Gustave Lytton's period owning The Jazz Soiree Club, he lived in a universe which was connected to another parallel universe. Another Lytton from the other parallel universe resembled (COMIC: Goodbye to All That) Lytton as he'd been when encountering the Fifth Doctor, (TV: Resurrection of the Daleks, COMIC: Goodbye to All That) suggesting that the Jazz Club version of Lytton lived in a different reality than the Doctor's universe. (COMIC: Goodbye to All That)

Behind the scenes
Cutaway Comics brands itself as being an "imprint of comics and graphic novels drawn from the darker recesses of a dangerous, unpredictable cutaway universe." The term "Cutaway Universe" appears throughout their branding, as well as the term "splinter universe".