John B wrote:

So they're getting 24 3-car Electrostars for the North London Railway,
replacing 23 3-car 313s and 3 3-car 508s? That's not much of a
capacity upgrade - some might even call it the opposite.

That was my immediate thought. It's all very wooly and unclear. It certainly
looks as if it's replacement on like-for-like basis *unless* by North London
Railway they mean the North London Line (Richmond to Stratford) on its own,
releasing the current 313s to strengthen Euston to Watford and West London
Line services or increase frequency? One presumes that these new
Electrostars will be 376s with the AC commissioned.