I can't believe they've still not sorted it out. ITV, more like Sh*teTV.
It's not neccessarily their fault. To me it seems like the encoders for the northern ITV channels are not working as their streams are missing from the multiplex, which may be an Arqiva issue.
Given the way they've all disappeared it suggests there is a power cut wherever the encoders are, and given that Granada HD IS on air and Arqiva haven't yet rerouted them to Southern regions, it would suggest that the problem is indeed on Arqiva's end and not Northern Transmissions.