There's a really good look at one of the Class 700s from the NRM, of all places:
https://www.youtube.com/watch?v=U6D8HXwYNQc...obviously the Desiros are built to be a bog-standard, unexciting, 'get as many people into and out of the capital as possible' train, but I like how the video shows how they fit into the wider ambitions for rolling-out ETCS/digital signalling along the ECML, along with a normie-friendly look at the actual, tangible reasons for + upsides of the investment. Good stuff.