From April 1979: the first issue of DCT's Star Age pocket library STARBLAZER.
The Dundee publisher wisely decided to avoid trying to lauch a me-too anthology into a market where 2000AD and STAR WARS WEEKLY were already slugging it out (with DWW, STARHEROES and FUTURE TENSE all still to hit within the next year-or-so) and opted to bolster their successful line of black & white digest pocket libraries instead (a market Marvel was also about to enter... albeit without much longevity) with this done-in-one single story title.
SB started on a one-a-month frequency before swiftly upgrading to two issues - released simultaneously - each month. It ultimately staggered on until (barely) January 1991, clocking up an impressive 281 issues.
Despite some top industry contributors (Morrison, McMahon, Ridgway, Kennedy and more), DC Thomson have been slow to exploit the Starblazer inventory. Maybe they should consider a sale to Rebellion...