London mayor bans ads with "unrealistic" and "negative" body images

London's mayor has banned 'unrealistic body images' from transport advertising (Business Insider)
London mayor plans negative body image advert ban on Tube, buses and trains (BBC News)

According to a press release from the mayor's office:

Quote:

Transport for London will not allow ads which could reasonably be seen as likely to cause pressure to conform to an unrealistic or unhealthy body shape, or as likely to create body confidence issues, particularly among young people.

Would someone kindly offer me a precise definition of the following:

(a) What exactly constitutes an "unrealistic body image" in an ad;
(b) What exactly constitutes an "unhealthy body image" in an ad;
(c) What exactly constitutes an "negative body image" in an ad;
(d) What exactly constitutes "body shaming" in an ad

via International Skeptics Forum http://ift.tt/1PZFXPf