I like to see Southesten high speed update with Anouncements in the train and have class 378 and class 700 with anouncements in the train.
I think Chris may have meant 375. Unless he wants to hear 378 announcements coming from Stratford regional station while the doors are open at International. Which I doubt. While we're at it, I don't recall the 390s having announcements either, so add them to the list.