Children's book ad censored

<p>Adverts for a children&#39;s book were amended to remove toilet humour before they could run on the London Underground, a publisher told the Guardian.</p><p>Posters for <em>The Story Of The Little Mole Who Knew It Was None Of His Business</em> had all &quot;inappropriate&quot; text removed, according to Anova Books. The publisher said its adverts had been &quot;censored&quot; by an agency working for London Underground. <br /></p>