My New Winter Coat

So in the end instead of buying the Jaeger Coat I loved at £450 I plumped on impulse for a Black Pea coat from Principles for £79. Its a bit of an odd construction as it looks like a classic double breasted design but with an inner zipped liner with a funnel neck. Being optimistic I imagine this will encourage good posture as I have to hold my neck up when wearing it to avoid looking like a turtle. Because of this all the weight of the coat is in the front and may need constant adjustment to stop it riding up.
The store I visited was in Buchanan Galleries in Glasgow. About 1/3 of the display is given over to a Petite range. They seem to have the same styles in this range as the mainstream stock and I wonder why the segregation. Is it to make things easier for shoppers?
Having checked out their website plenty of the styles were available in a 20. In fact a well-edited selection. In the store however I could find very little to try on. This was compounded by the fact that sizes are not on the hangers and the clothes were not hung in the usual size order (8 at the front working up to the biggest at the back) The store seemed pretty tidy otherwise but there was no logic to the displays and I was starting to feel a bit awkward checking every label. An assistant did approach me to ask if I needed help and with the Jaeger debacle still fresh in my mind I asked if she new if they carried anything in a size 20. She replied that there may be some things but thought that most of stuff in this size was sold online cause people "prefer it that way".
Reader, I bit my tongue. Well actually I just grunted and continued searching coming up after about 30 mins with the coat and a green cardigan.