According to JJ20X on Forum Box there are 4 new channels on the network.
https://www.forumbox.co.uk/forum/thr...9101#post89101
2 SD and 2 HD. They just have names like Channel A SD, Channel B SD, etc, so not much to go on.
Probably Sky Documentaries and Sky Nature in SD and HD variations, but you never know, that's just my guess.