From 1991: the original DEATH'S HEAD crosses the Atlantic for a rare US appearance in the pages of THE SENSATIONAL SHE-HULK 24.
Appearances by Marvel UKverse characters (except, of course, it didn't exist when this appeared) outside their own books are so rare that its often easy to overlook them because you just assume they don't exist to begin with.
This has a higher profile than most because it was included in the DH Panini trade paperback collections.
The She-Hulk, somewhat of a second tier title, was by this point in the care of Brits Simon Furman and Bryan Hitch, a dream team combo of DH collaborators that made the guest shot possible.
Unfortunately, it wasn't enough to convince incoming British Bullpen boss Paul Neary to relaunch the Freelance Peace Keeper in a new limited series, pitched at the States, and he scrapped the project in favour of DEATH'S HEAD II and the start of the UKverse the following year.
There was, except for the much more recent trade paperback, no contemporary UK edition but it was reprinted in the hard-to-find final issue (12) of THE INCOMPLETE DEATH'S HEAD in late 1993/ early 1994: one of the final titles to emerge before the Genesis Massacre shredded the UK line.