TV Century 21 issue 1
From Jenny Everywhere Wiki
An issue of TV Century 21 featured cover stories regarding Stingray and Steve Zodiac, (COMIC: Jenny's Christmas Surprise) as well as a The Daleks comic on its back. (COMIC: The Curse of a Fairly Normal Halloween)
History
Read by the Fifteenth Doctor
On Halloween night in one universe, the Fifteenth Doctor read the instalment of The Daleks printed in the issue while leaning against his TARDIS. (COMIC: The Curse of a Fairly Normal Halloween)
On Jenny Everywhere's floor
On Christmas in the same universe, Jenny Everywhere had the issue on the floor of her room in 31 Spooner Street. (COMIC: Jenny's Christmas Surprise)
Behind the scenes
Although not explicitly identified, the issue seen in the above stories was the first issue of TV Century 21.