I'm delighted but surprised to see that most people do see beyond meeting the basic rules regarding fuel carriage, particularly when operating to very busy and unpredictable destinations such as Lhr.
I agree with Wig Wag that some individuals carry too little fuel in order to impress their superiors, and in addition to this some relatively junior fleet managers apply pressure on their crews in order to climb the greasy pole to more senior positions.
If this thread has made even one min. fuel merchant reconsider their actions, it has contributed to long term flight safety.