there should be a range of shapes and sizes of models
This
Whilst clothes may look good on the tall and slim, in reality the people wearing those clothes will be a whole range of sizes and shapes. Boden sizes range from 6-22. If they were only showing their clothes on size 22 models then that would be unfair as well. All people are asking for is to see what a dress looks like on a size 10, 16 or 20 as well. I'm sure that if Boden did that they would actually sell many more clothes.
The whole fat/thin shaming is getting tedious as well. I'm fat. 20 years ago I was very thin. There are genuine reasons why I was/am at either end of the spectrum. I have also been in the middle. I am like many, many women on MN and in the world. Currently I am a size 22 because I ate too much over Christmas, I'm struggling with my breathing due to my asthma playing up and I can't move so much. None of that means that I should not be allowed to buy nice clothes. To hear some people you would think that women over a size 10 should go around in shapeless tents. Well no. I already feel crap about my weight so why shouldn't I try and make the best of what I've got whilst trying to lose some of it?