Yeah, that's true. Expect that will change with the next set of new trains, as with the newish S Stock on the subsurface lines. Not all mainline trains have AC

Yeah, that's true. Expect that will change with the next set of new trains, as with the newish S Stock on the subsurface lines. Not all mainline trains have AC either, though I think it's been nearly universal on new trains from the 90s onwards.