By default Poolys, is the authoritative document for the average UK GA pilot, some use some lower quality publications and a few use the much better Jepps. However I don't see. Anyone with the UK air pilot in the cockpit.
A and C - With respect, I think that you miss the point. If contributors are going to discuss the published procedures, then the AIP (sic) is the only authority, however good a copy the information in a commercially produced publication may be.
However this accident has very little to do with documentation...
Documentation = published procedures. How do you know that these were not a factor, e.g. compliance or non-compliance, appropriateness, etc?
2 s