Went to Adda on a Saturday afternoon for their high tea. They had a nice variety of teas and the food that was served was exquisite. I tried three different types of tea and enjoyed them all. For the food we were served scones with cream, vegan pea puree on toast (turkey sandwiches for non-veg), quiche, apple turnovers, pecan nut bar, and lemon shortbread.
The quiche was absolutely amazing, it had just the right consistency of light and savory. The sweet items paired as really nice finger foods to go along with the tea. I did not have a single item that I didn't enjoy. The pea puree on toast was nice because it was something different.
Overall wonderful experience, only thing that was slightly odd was that the high tea was overbooked so we had to share our table (reservation of two) with another reservation of two so it wasn't exactly a private experience. I wished I had been notified of this policy while booking just so it wasn't sprung upon us after arrival.