Where's the jazz in London?

It's all too easy to get despondent about how much (or rather how little) jazz there is to be heard in London. Rather it's how hard to find out about all the jazz in London before it's happened. Indeed, there's Ronnie Scott's, the Pizza Express, 606, Bull's Head and the Vortex. But the real excitement is what's bubbling underneath - all too often unfindable, or only to be found too late. Seb Scotney is getting his teeth into this part of the scene on his LondonJazz blog.
For example, the chance to hear Uri Caine in Greenwich on 18 February, courtesy of Trinity College of Music. Or the work that Richard Turner puts in at Cons Cellar Bar in Camden. Or Troubletune at Concrete Bar run by Zed-U, which I went to yesterday. (A mesmerising collaboration with Jason Yarde using looping and electronics as well as beautiful saxophony.)
The shame is perhaps that the musicians themselves are so committed that very little money comes back to them. And the opportunities to "cash in". Dependent on door money, if any at all, and the long-term passion for playing and performing. They know how to improvise their lives to adapt to these passions.
By the way, Zed-U's next Troubletune is on 18 February, with Seb Rochford as guest.