A poster for a live zombie apocalypse experience has been banned from the Tube network after an advertising watchdog branded it "distasteful" and "unsuitable".

The Generation of Z Apocalypse poster ad had been displayed at stations across the London Underground and Overground to promote the event where 'soldiers' help the audience survive a zombie massacre.

Event organisers, The Generation of Z Ltd, used a poster of a zombie head with sunken eyes and blood-stained teeth to convey the adult theme to their target audience, and said it did not mean to cause any offence.

But, the Advertising Standards Authority (ASA) today banned the poster saying it was"unsuitable" for display on London's Tube network as it can be seen by children.

The organiser's agreed it could be viewed as distasteful and were now working with a different advertising agency to re-brand the show.

The ASA, said: "We acknowledged that The Generation of Z considered that the image of the zombie shown in the ad could be viewed as distasteful and following a rebranding of the show, a new advertising campaign was to follow.

"We understood that at the time the poster appeared the show was targeted at an adult audience.

"We noted that the poster was highly stylised and designed to promote the horror theme of the show, which featured actors dressed up like zombies and wearing monstrous make-up.

"While we considered that the sinister image of the zombie would not cause distress to older children and adults, it could distress young children.

"Therefore, we considered that the poster was unsuitable for display in an un-targeted medium where it was likely to be seen by young children."