Ah I did hear mutterings of this possibility, but originally it was purported to be an add-on to the 378 fifth-car build. Either the outstanding contract with Bombardier doesn't allow this to be viable, or they must find some serious better value if they're opting for what is non-standard for the moment; though of course it will be in common with the Goblin electrics, albeit with the proviso that they ensure DC-equipped units remain on the Watford line.