Magazine criticised for 20 stone front cover model - is it promoting a positive, realistic body image? Or glamorising obesity?

The 'Cosmopolitan' magazine has been criticised for featuring a plus sized model on its front cover. The snap features 33 year old American Tess Holliday. Holliday claims the message she sends is one of positivity. But critics say at 20 st and 5ft 5inches, it sets a dangerous precedent. So - is this promoting a positive, realistic body image? Or glamorising obesity? Stephen got the views of size acceptance campaigner Kathryn Szrodecki and writer Emma Woolf.