I'm still waiting for the fat & short range to come out somewhere, for some reason clothes designers think if you're big you must also be tall and statuesque, and petite ranges usually finish at a 14/16 max.
sorry but this made me laugh because I was just about to post the opposite.
I am slightly taller than average, not enough for places like Long Tall Sally, I am 5'8" but I do have long body.
My biggest bug bear with all shops, but M&S are particularly bad, is that their sizes only go wider and wider, and don't take into account the fact people might be taller. What is worse, is that the longer length things which M&S do are only longer in length, they don't ever balance them, where the waist is for example.
I guess they only make clothes for average height, neither tall nor short can fit!