From Tony's most recent update I can only conclude the following:
Corrie is seen leaving on cctv but is one of the unidentified 23. Unidentified maybe because of a clothing change or unclear picture. In this scenario you can assume he binned his own phone, logically to go awol.
Corrie left in one of the four vehicles. I think the bin lorry is pretty safely ruled out (for him not the phone) the update doesn't mention specifically what action is being taken with the cars. So, either the same as situation one, he's binned the phone and used the vehicle to go awol. Or, an altercation happened in the loading bay, his phone was binned and he left in a vehicle. I'm ruling out going willingly purely on the phone evidence, although it's possible the phone did travel with him, in that situation it would suggest getting in a vehicle willingly.
Lastly, he stayed in the loading bay until after 8am and further footage needs to be viewed. Interestingly this one is seemingly ruled out based on Tony's description of the searches in the area. But, who has access to the buildings at 3-4am on a Saturday morning? Who has keys to those properties? Potentially interesting. In this instance I would assume he was forcibly taken purely on the phone evidence of pings.
To rule out the first scenario the 23 have to be identified. A mean feat and one I'm not sure is possible, or they need a reliable witness sighting corroborating him leaving in this manner.
Scenario 2 to be ruled out would be the usual, searching and testing for all the vehicles, alibis for all who have access to the vehicle and a timeline of the person driving that night. As well as catching up with all cctv in outward areas to confirm car movements. From the wording it seems the other vehicles entered the loading bay opposed to being in the vicinity however this is no confirmation on this so you can only assume it was possible he had unseen access to get in one.
Scenario 3 is seemingly ruled out but I guess if there's further testing they can do inside, store cctvs and interviewing all staff who had keys that would help.
It doesn't seem such a mystery any longer, more constrained by budget and resources. Which is frustrating for all involved.
I only include awol purely because I feel it can't be discounted as a credible theory. While the family have confirmed Corrie wouldn't have gone awol it is still a possibilty based on the options we have, hence leaving it in.
I'm still thinking option 2 personally. This doesn't cover any motives or what happened next obviously.