Agree with the previous poster that the key to this is the photo in the AAIB report (clearly not chosen at random) and the statement that they have photographic evidence to show the cowls were not closed. Further, the recommendation is aimed at Operators, not Airbus, suggesting the AAIB have a view as to who needs to raise their game.
If the picture is representative, all the stuff about the need to crouch or lie down to see the latches is not germane to this incident.
I am sure many on this forum will suggest this was not a particularly serious incident - to humble SLF a fractured fuel line and a fire external to the engine that could only be extinguished on the ground is to close for comfort.