Hmm, well we know he parked on Boby way because that's where the car ended up (hadn't moved). I was under the impression the "drinking vodka in car" had come from Corrie's brother but don't quote me on that and I can't remember where I read that (here I thought). One thing is certain, main cctv system cam53 (flex) would not see Corrie in his car, in fact it looks like another cctv black-spot. cam07's location is a bit mysterious, not sure if it's in the Waitrose car park or king's road, but either way liklehood of seeing R.B.Way... slim to none) So unless Waitrose have CCTV installed more recently than the GE images, but as someone else said, even then there's a high bush and R.B.Way is several feet lower than the Waitrose land.
So basically whatever happened at Corrie's car, has come from witness testimony, maybe a dashcam at best (but unlikely I'm sure) or what people were "told" over the phone. Someone mentioned students or sth saw him parked there? But they are not the ones that gave us the "was drinking information"? It'd surely be possible then, if Corrie told one of his phone contacts he was drinking in his car, that he might not have been in his car at all. It's not necessarily malicious to say "in car drinkin" when you've just walked out of it a minute ago, it's just easier to say...
But a breakdown of where the information about him in his car has come from, would be useful. Cos it surely can't be being derived from any CCTV footage.