If you happen to be passing by during RAJAR periods, you'll know that I now tend to put together a nice chart of historical RAJAR that you can play with.
This is for the national picture of course. And I'd meaning for a while to have a look at London specifically. A few weeks ago, I did precisely that, but promptly forgot to tell anyone about it.
So why not wander over to the fullscreen London version of the chart and have a play! Full instructions can be found under the chart.