Wasn’t the closure of Granada Plus a short notice thing? There may be edits that never made it on Granada Plus.
That’s what James implying to in his post. ITV3 and Plus were going to be ran as separate services, but ITV were desperate to get ITV3 onto Sky and getting rid of Plus at the very last minute was the way to do it. So there’s a good chance that some Plus edits were already in the can, even if it’s for altering the endcaps only.
By 2004 Plus was known as Crime Plus between Midday and 2:00am, so all the good programmes had long departed by this point. In Corrie’s case it was only being shown at 9:00am if memory serves me.