You're NOT listening! COLP asked for the original log of the phone call (or at least an EXACT copy of it) to see if it had been altered. However, what they got looked the same until you look at it carefully then you can see that Tolleshunt is spelled incorrectly in the copy which means it was NOT the original log or an EXACT copy. Now why didn't they send the original?
I'm listening fine. Years later how are paper pushers are supposed to figure out which is the original verse a copy and they sent the wrong thing. For all we know the original was left in a copy machine and disposed of that happened to me at a kinkos once during a document production. Leaping to the suggestion tha tthis means Nevill made acall is already ridiculous but to say that means it proves he called Bonnet at 3:36 is crazy since there is no way Bonnet would have fielded a call.
Clerical errors happen all the time at all states- (drafting/editing/mailing/filing etc) trying to read too much into that doesn't work. You can try digging because of it to see if you find something but it virtually never leads to anything.
When I was in high school word processors took over typwriters which by college had been largely replaced by computers though the internet really helped finish off typewriters and word processors completely. Most of the documents I revewed early in my career were from the 1960' to late 70s so all typewritten or handwritten and there would be numerous versions of the same documents because of editing. They kept the drafts and all changes. Sometimes they said draft but usually not so trying to figure out which document was the final version was near impossible in many instances. Documents that needed to be filled out in duplicate or triplicate will have various differences because of typos what is the original if you need to file in triplicate and the 3 copies are different? What if they make a mistake, redo it and keep both the error and the revision even though the revision is what they filed? SOmetimes errors are trashed othertimes they are retained though never provided to anyone and simply left in a file.
Electronically maintained files are nice because you can figure out when any changes are made and what they are. Moreover, scanned documents can be sorted and made searchable on a CD or card drive. Technology is a blessing but in that era they still relied on typewriters and that must be allowed for. Not that typos don't exist today they certainly still do. Dates particularly are still screwed up regularly, month, day and year. Sometime it is because a template is used and people forget to plug in all relevant information from the matter at hand. Other times just a typing error. If changes and revisions are to something critical then it is worth a good look. If the log actually claimed Nevill had phoned 999 and 999 passed the message to Bonnet and it was crossed out on another copy then that would be pretty significant as far as investigation. There isn't anything close to that though.