I looked at the Ceffin website (don't like green, the colour of the first dress on the list! The dress does come in other colours though), like Samantha Cameron's uncomplicated designs. She seems to be designing clothes that would suit her or she would like to wear too. They look very comfortable and smart casual.
I'd imagine most of us buy our stuff from high street stores or online, I'm happy with Wallis, Debenhams, M&S but for something special I'd look anywhere.
Simple, plain and inexpensive outfits can look really goodd if expensive accessories are added.
Many young people buy designer clothes from good charity shops, they get some real bargains, things they couldn't otherwise afford. Nothing wrong with that.