Ask HN: Where can I find quality JavaScript courses in london?

I am currently working for a company with a small technical team, 3 people. So my learning is often an isolated process which can at often be slow and at times be frustrating. Thankfully there is a small budget for my self improvement. I have found real life courses an efficient spring board into learning new topics. Currently there is a real need to learn about unit testing in my company. Does anybody know any good London based courses/ workshops that will cover JS unit testing?