No idea - sorry.
I am not making excuses for them but your post made me recall when I would studioulsy up date the guide to account for the amendments during the year.
I eventually realised that it was a complete and utter waste of my time and gave up doing so. Frankly nothing of critical important ever really changes.
It is a different matter when it comes to plates; I am not an advocate of using plates that could have changed but far less worried about a VFR flight guide.
I always thought AFE to be the best but after I couldnt get a copy last year changed to the opposition. I will probably change back next year if I can.