Does anybody seriously believe *enroute* traffic will be affected by a 770ft crane over Central London?
Clearly the answer is yes, otherwise this accident report wouldn't exist. Whilst many people are experts in their own little niche of aviation, often they have limited understanding of other types of operation.
Regarding NOTAMS, TAFs and METARs, plain language is not plain language for someone with a different first language and aviation is an international activity. Although he codes take a bit of effort to get to grips with, with repetition and familiarity they minimize ambiguity and are fairly easy to understand.