My new strategy is either to go for the first stall that draws my attention, or to go to Borough Market when not especially hungry, then I end up buying some bits and pieces to try at home.
One of my successes was a couple of (English) muffins from The Flour Station. Enormous, squashy pillows of joy. I kept it simple, sliced them in half and gobbled them down with thickly spread salted butter and a dash of marmite.
They were divine.
P.S. In the Metro yesterday, Kappacasein, also in Borough Market, is supposed to serve the best cheese toastie in London... I'm definitely going to try it! In the name of research, of course.