Not bad, about the same charge as GNER IIRC.
Don't forget, this is how we get such excellent new technologies, by paying for the installation and so forth through the useage charge.
Wi-Fi is also available in selected areas of Paddington, if not all of it, but whether a charge is implemented here I don't know.
I'm very interested in Wi-Fi, especially when I eventually get a laptop and Wi-Fi card to use. Nothing like being able to check connections at Edinburgh when you're still on the train passing through Chathill. Or like being able to post gen, news and comments/debates/rants on the forum whilst the gen/news/rant is still fresh.