On Saturday 30th April we went, for the first time, to the Serpentine Sackler Gallery - I still haven't been to the Serpentine Gallery. They're both free, and the Sackler is newer (opened in 2013, according to Wikipedia, in an old magazine building). We were there because we'd gone up to Hyde Park to use the hire bikes, as we've done before; last time we did it we were quite near the SSG, since there's a hire rack near it, and we had time to do it this time.
It was interesting to go in, but it wasn't a great exhibition - just another modern art exhibition, this one from Das Institut collective. The most pointed thing in it was the re-use of some old stained glass in some modern glasswork, which showed a great contrast in artistry and craftsmanship between old and new, which you think would have made the artist ashamed.