[ASnep]

Channel Islands is an interesting choice there.

Do they already have their own HD mux or do they get the same as the south west, with (I think) ITV Central

I believe the Channel Islands a modified version of an English mux (though I can't remember wich one), where ITV1 HD is removed from the service list. The video and audio data for ITV1 HD is still there, but it is inaccessible to normal equipment.

I think it is because of legal reasons (with the Channels Islands not being part of the UK) that ITV can't show any other version than Channel TV on the islands. Probably why they are one of the first ones.