Gigajoules and paxboy, many thanks for that video and the explanations, but that does not answer the major question : what was visible on that night ? It is not because green centre lights were installed and ON , on a 2011 or 2012 night that there were ON that night just before BA taxied.
Aslo in case they were INOP, was it known to ATC , was the INOP just mentioned in a NOTAM, or on the Ground R/T ? etc.. Those kind of answers would help . But I am speculating . Maybe the cause(s) of this accident ly elsewhere altogether.
One thing is sure, ATNS and BA know the answer already by now , and since both did not communicate about it yet, this could indicate a more complex " shared" scenario
