Breathing Space is a comic strip by Rob Williams, Peter Doherty, Laurence Campbell, Lee Townsend and Ellie De Ville, published in 2000 AD progs 1451 to 1459 and reprinted in the Judge Dredd Megazine #294. It was set in the world of Judge Dredd on Luna-1, a semi-lawless extraterrestrial settlement where oxygen is scarce and the shadows cast by the Earthlight are dark enough to hide a murderer.
According to Rob Williams, "I fancied doing a noirish murder mystery in the Dredd universe, and Luna-1 seemed a great setting, like a western frontier town. I wanted to write a standalone — no sequel, no attempting to set up a longstanding 2000 AD character... There's a lot of things I love about Breathing Space — its mood, its narrative structure, the whole look of the series. I was being quite experimental with panel layouts. On the downside, it's very difficult to do a satisfying whodunnit in 45 pages when you only have a small cast. That's something I discovered after the event." (Thrill-Power Overload by David Bishop.)
Breathing Space was included in volume eighty of Judge Dredd: The Mega Collection, which is entitled Dark Side of the Moon.