Switched and unswitched +12v sources for DVB-T.

[HPsauce]

I'm looking at adding a DVB-T tuner to my RNS-D. I've had a rummage round both here and wider online and not found a clear answer on where to pick up power from.

I already have the tuner and aerial, I played with it a fair bit on my PF S8, but there I already had the early analog tuner (and wiring) to interface through to the RNS-C. There is no tuner in this car, just the CD player.

Are switched and unswitched +12V available in the loom to the RNS-D, I've looked at the labels but can't interpret them? I'm thinking of how to provide power to an A/V interface which as far as I can see will need both.

Also, what power (and in which core) is supplied to the CD changer; I'm wondering if I can tap into that for the tuner and/or interface box. All I have behind the boot panel is the CD changer and parking sensor unit.

Ideally I'd like to use the tuner with ignition off, so a similar mechanism to whatever turned on the OEM TV tuner would be ideal, unless that's done by a signal rather than supplying power.
However, I didn't solve that problem on the PF car, so I could only run TV there with the ignition on, so maybe it's beyond my skill set?