For all of you doubting and making fun of what I wrote here before, here is the article in one of the world's oldest and most respected sport newspapers. Hope you all can read Spanish or at least Google it. http://www.oem.com.mx/esto/notas/n2578635.htm
Alberto Lati has been televisadeportes.com specialized envoy for the Olympics and World Cups. He has been in London for over a year and has one of the best dream jobs in the world. He is also dying to discover all the inner works of the ceremony and has talked to many more people from IOC and LOCOG than we can ever dream of.
You can keep track of his discoveries at twitter.com/albertolati or watch him on TDN or Canal de las Estrellas networks, available worldwide.
Hope I can bring another one here soon.
PS He clearly states that Heatherwick himself told him that it was the lighting method that required an auth from the PM, whom, by the way, at that time, was visiting Mexico. Orbit fans, read the article carefully.