It is obvious from many posts that there is justified disbelief that the error (operate park brake instead of flap lever, and not spot the warning) could happen at all.
But the point is that it has happened, because it can happen.
At the risk of being boringly repetitive, it is not enough simply to improve the chance of capturing the error prior to landing, as recommended by AAIB.
Action is needed to eliminate the possibility of the error occurring in the first place. Perhaps some or all operators have done that, by going well beyond the AAIB's recommendation.
But because of the financial consequences, perhaps not. In which case, the error WILL occur again. Let's hope that when it does the only consequence is some burst tyres. But what if the surface is very wet, maybe not even grooved?