Keep it ... pls ...
After 7 yrs at LHR with 2 operators, it makes it one of the easiest places in the world to operate at. Even with all the new, confusing t/way deisgnators around all the WIP over the last few yrs, "follow the greens" actually makes it easier to taxi at night, than day.
Brilliant system keep it, and the BA mgt prob. need to go and have another look at things. (I am being diplomatic for a reason :-) )
K1.