[Rex]

With the channel closing, is it possible for ITV to use the bandwidth to add an extra HD channel to Freeview - ITV4 perhaps? I realise they'd need more bandwidth for that, so potentially closing ITV2 +1? I'm not clued-up on the technical side of things like this, just wondering if that would be at all possible.

CITV is currently being carried on Multiplex A, a band of channels that isn't equipped to carry HD material. Don't expect ITV to add HD versions of channels when there is virtually no bandwidth at the moment to do so.

Expect an extended ITV3+1 which accounts for the entirety of the broadcast day save for teleshopping. I don't think they will replace the channel on Sky, Virgin and Freesat, there's simply no appetite for them to reuse the channel space for something else.