The data only channels are a waste of epg space..!
One of the functions of the EPG is to facilitate channel changing, so I don't really mind the data channels showing up on there. But do we really need to see the EPG populated with 6 hour blocks which simply repeat the channel name. If they must populate the EPG with data, they could at least use 24 hour blocks. It would be preferable not to populate the EPG at all for these channels, they would still show up as channels but with no programme information.
Although, as they are largely accessed via the red button, do the BBC and Sky data streams really need to be assigned LCNs? The number of people accessing the streams directly from the data LCN must be fairly limited.