Sounds like a stereo mix to me, maybe the pre FM mix is used as the audio track for this upgraded edition
It says licensed from ITV archive so maybe the did indeed get as close to the source as is possible
Intruiging they used Rolling Stones mobile. My guess is they contemplated a live album from the tour but shelved in favour of a TV broadcast . I think one of the newsletters from DSIS says as much, that the material was too similar to Alchemy. So masters probably in a vault somewhere who knows
Chance of an official release to purchase? Nil, I'd say. MK not interested in anything but regular paycheck from DS catalogue. To do release like this would require some investment.