Well, if its the British Way then its news to me!
Heathrow Director,
As a matter of interest, how often are you talking about? 10% of the time? 1%? Or what?
Are there any operators that do it more often?
There are certain types of finger trouble that can catch any of us out, if the rate of occurance is very low I would suggest that error is a more likely cause than deliberate policy.
CPB