Does anyone know if the London Euston to Watford Junction line is entirely 710s now? Or are there any 378s left on that line? I know it used to be all 378s and then it seemed to switch to 710s only. I have not seen any 378s on that line for a long time. But i was told they still sometimes get used. I am not sure if any are still booked or it is just when they are short of trains. Does anyone know if there are actually any booked 378s workings? If so which journeys are these?