Today or tomorrow I might go and have a look at Margaret Howells Sample Sale . I do like her style, clean cuts and classic shapes and with a few % off it might be worth a look.
But if you feel less frivolous, around the corner you can catch the last week of the Modern British Sculpture Exhibition at the Royal Academy.
As you might have noticed, I am not a purist and I do not mind mixing. And London is the perfect city for this kind of approach. A tiny bit of planning is not a bad thing, because ist is a big city after all, but combine this with some drifting and you get a perfect day in the city.