What in the world are they playing?
In some pictures on Dead Air Space, as well as for the 2010 Glastonbury and Henry Rollins Show performances of Cymbal Rush, Jonny is using a peculiar Ondes-style keyboard. It is clearly not the French Connection, though similar. The most noticeable difference is that it features a set of jacks on the back of the unit along with the power input.
Also unlike the French Connection, it seems to have the actual sound generator inside the instrument, evident from the multitude of controls on the front of the instrument, and the fact that no external synthesizers, modular or otherwise, are ever connected to it. It does not look to be made by Analogue Systems, nor to be an Ondes due to the placement of the control panel, the number of octaves, and the size and shape of the entire instrument. It is also clearly not an Ondéa for the same reasons.
Sonically, it sounds very much like an Ondes, definitely closer than his Analogue Systems setup to my ears.
Is this a completely unique, custom instrument? It seems possible. If only one could simply ask him…
For those interested, this issue has been definitively solved here: http://thekingofgear.com/post/36815684184/a-conclusion-to-the-ondes-french-connection-prototype