I think they need to accept they can't design women's clothes anymore. Weirdly their men's clothes aren't as bad, when we were last in London we bought a really nice tweed jacket for my husband. There was some really vile men's stuff, but in the main they went less wildly astray - probably because they have to stick to neutrals and basic shapes more. No 70s wallpaper for the men.
They should cut their women's stuff right back to underwear, nightwear and accessories, and keep on with men's and children's.