If he was totally unable to leave on foot it only leaves a vehicle doesn't it?
I still feel there might be a chance Corrie did swing himself into the cardboard collection bin lorry.
It was clean, it would give him a lift partway (and here I will add I believe it is possible an expected lift was missed/didn't arrive).
Yes there are cameras on the lorry, but if he had jumped on as it was leaving I doubt he'd be noticed then he could jump onto all that dry, clean cardboard. He wouldn't be seen on CCTV either if he was inside before it left.
Got himself out at say the roundabout (would he have sat nav on his phone so he knew where he was?)
In the process of exiting he dropped/lost his phone which may account for the later pings.
He then tried to walk the rest of the way back to base and unfortunately has succumbed to an accident probably in water.
My alternative thought is that he got a lift part way back to base, then the above happened. I cannot understand why the driver of this lift (in this scenario) hasn't come forward though.
I would like some searches from his base working back to where that bin lorry took a different direction.
I would love to hear "found safe and well", but that doesn't happen often enough sadly.
Obviously I can't say for sure, but the biffa recycling lorrys that collect from mine aren't a lorry shape as such. There's loads of little compression boxes and it's not overly big. You couldn't get in it in any case.