This is really a question for DarrenDev. I'm very happy with Freeview via broadband BUT I'm disappointed that the extra Channel 4 channels (More4, Film4 etc) are not in HD. All the other "standard" terrestrial channel providers (BBC, ITV, Channel 5) extra channels are in HD. Surely, in any negotiations with C4 this could be pointed out? I understand the Virgin platform has all these channels available in HD.
Virgin and Sky have them as part of a commercial arrangement with Channel Four... I'd imagine that until that deal arrangement ends, they'll stay behind a paywall... ITV had a similar arrangement that ended so they are now able to make them free to air where possible.