When did the comic, with which "Plug" merged, first run?
Plug (comics): Plug was a British comics magazine that ran for 75 issues from 24 September 1977 until 24 February 1979, when it merged with "The Beezer". The Beezer: The Beezer (called The Beezer and Topper for the last 3 years of publication) was a British comic that ran from (issues dates) 21 January 1956 to 21 August 1993.
21 January 1956