Doctor Who Adventures Issue 246 (in-universe)

The Eleventh Doctor wrote a message to a group of students who were reading an issue of Doctor Who Adventures, warning them that their teacher was actually a Hive Monster from Framasis Major. (PROSE: Hello, Time Travellers! 246)

Information from invalid sources
The issue's cover was hanging up in the Doctor Who Adventures offices when Mrs Tinkle and Nervil payed a visit.

The cover depicted a Silence, a Cyberman, and a red Dalek alongside the headline, "Alien Invasion! Could you survive a monster attack? Find out inside". The Eleventh Doctor appeared in the top right corner with a word balloon that said "Remember what you've learnt!", beside a heading that advertised a "free cool mobile phone set!" It also advertised "cool posters" and the ability to "Win prizes every day!" (COMIC: AAAGH! 250)