When I had my first airline job I was based in MAN, the taxiways are poorly laid out and marked, and thats in the day, at night in the wet all i can say is
Im now based at LGW and on my first flight out of there i was exposed to the 'follow the greens' system... I commented to the Captain that this system is great and it should be used everywhere!! ESPECIALLY IN MANCHESTER!!!!!!
To have the system removed would be a SERIOUS error of judgemennt.
If BA is raising this as an issue, all I have to say is - BA sort out your own backyard before 'sorting out' everyone else's .