City Magazines was the original and exclusive licence-holder for the comic strip featuring the Doctor's arch-enemies, which would later become known by the collective name The Dalek Chronicles.
While they held the Terry Nation-granted right to publish Dalek comics, their rival, Polystyle Publications, Ltd., were unable to use the Daleks in the First Doctor comic stories. Likewise, because City didn't hold the rights from the BBC to publish Doctor Who comic strips, they were unable to use any characters or situations from the television series.
City used their licence to help launch their otherwise Gerry Anderson-themed magazine, TV Century 21.