On our trip to London we visited some nice Coffee bars. The most impressing was Flat White, started by Cameron McClure. Superb latte art and etching, together with a very good mouth-feel, nice works. The atmosphere is really cool and open for a chat..
This is the hot chocolate they served:
If you can visit the place, take some time for it. Below you will find some pictures.
All photo credits to Flat White (Website)