Fairly easy to establish whether Corrie was in another bin I'd say. The bins are all weighed for businesses to be charged, the police could check the charging records for the following few days, identify any bin load over 90kg and take if from there. Unless we're circling back round to the cover up and conspiracy IMO it wouldn't be hard to spot a bin that was one off much heavier than expected (a grown man's worth of extra rubbish would stand out I'm sure) and trace it's journey to the land fill. Forensic traces of that kind wouldn't be easy to clean up without anyone knowing or well enough to totally eradicate any evidence.
JMO of course but I think the bin's a non starter, and for everyone's sake I hope I'm not wrong abouut that
It seems like such a simple explanation, you'd think it would've been obvious fairly quickly however. I just don't know, without vehicle information we don't really know much