Lost? In what way.
Ive found the BBCi channels tend to disappear out of the main 28E channel list on my 7020. The fix is easy - put them back into the tv channel list using Dreamboxedit, THEN put them in a favourites folder. Even when the channels disappear off the 28E list they are still available from the fav list.
I think the reason they disappear is they are actually flagged as data channels not tv channels. You can change this using DBE but the tv/data flag on the channels gets reset for no apparent reason at erratic intervals.