Actually No the ANO was not being breached because the tugs were exempt having more flashy lights (if you pardon the pun), to make up for the nav lights off. Agree with the others, BA didnt use anyone in the flight deck so had to ensure the a/c was chocked prior to and after towing with park brake left off. Sounded dodgy and didnt agree with it, but told to do it nevertheless
Cheers