Thank you all; your links and descriptions are inspiring. I’ve had a great time browsing the links and references which were mostly new to me though I’ve had some good luck at Toast and Jigsaw in the past.
My budget for separates (although the Klements dresses are gorgeous) is £250-300. So I am thinking one fabulous half and one more practical half. Eg a gorgeous silk or knit top to last forever with a more ordinary skirt or wool blend trousers - or jeans - or beautiful wool or velvet trousers or a full swishy skirt in a great fabric with a good top.
I love the Toast jeans and that style of cropped trouser with side zip more generally, @DieDreiHexen . My great fear is looking like a provincial lady on a day out.
Can I wear high boots with wide, possibly cropped trousers?
@bunnybunnybunnybunny your outfit does indeed sound fabulous. Just thinking about it is helping to shake me out of this boring (non)fashion rut.
@BeetledBrow thank you especially for the less well known links, great finds. I think Wiggy Kit was my favourite of all.
@IHaveNeverLivedintheCastle we are also going to see Oedipus at the Wyndham, though I plan to make a break for the hotel, a shower and a change of clothes before dinner. That is a gorgeous dress, though the cut doesn’t work on me.