I agree high street shopping is depressing at the mo if you like to look pared down/stylish.
Online is the way forward with some EBay offerings to keep the price down.
Most of my wardrobe is made up of jumpers/thicker jersey top/tunics because the weather is shite most of the year. The clothing needs for two weeks of summer we generally get can be met with some plain maxi dresses with a cropped denim jacket I find.
Back to the point of where to buy. For me the following works for my average size 12-14 frame with a stomach that has seen better days. I also like good quality shoes ....
White Company consistently has good basics. Perfect maxi dresses, tunics that aren't too long, light linen tops/ jumpers. They are expensive but they are good quality and flattering.
Phase Eight - excellent for jumpers that skim a muffin and have a nice slouchiness about them.
Pure collection- great cashmere and linen
Mint Velvet - their shoes and boots are excellent quality. I don't get on with their clothing as too much polyester is used and cashmere money charged,
Autograph- great for substantial cashmere that washes well and other basics too. Autograph does some great shoes as well.
Woolovers - pick your cut as they do a lot that is frumpsville but the quality is there.
Jigsaw- only their winter collection. Great for coats and knits, Shoes generally good too. Generally a nice colour palette too.
Next for great jeans and longline vests that stop little holes forming in other clothes when worn underneath.
Blue Velvet shoes.
Hudson for boots.
Companies I have found disappointing in terms of materials used and /or cut of clothing- that are supposed to be aimed at our age group. Also shoes-
Hush
Mint Velvet clothes
Whistles
Baukjen
Laura Ashley
Boden - esp the shoes.
Clarks
John Lewis Modern Rarity
Everything else at Marks and Spencer
I agree that a long sweatshirt dress is a hard thing to find.