Tigger Too
Like any business BA is not immune to making mistakes, or not dealing with the situation to everyone's satisfaction. I believe they get it right more often than not.
It is not a blame game, but a fact that flights were regularly delayed due to lounge passengers arriving late at the gate for whatever reason. The distance to the furthest Victor Pier stands was another contributing factor and as a result of the analysis you may have noticed the number of "time to gate" signs that appeared around the terminals to highlight the need to allow time for the walk. In those days my office was located on the V pier and believe me I had no need to join a gymn after walking to the main terminal offices for several meetings most days.
T5 is a breeze compared to that!!
Delays are not only costly to airlines, but inconvenient and annoying for passengers.