Just to back up excrab's comments, the routing for the BGY sector in 2003/2004 took us at least 70nm to the East of Mont Blanc, and Drift Down/Pressurisation Failure procedures were fully covered by our previous Fleet Manager following questions raised by pilots operating the route.
With regard to the rubber jungle, in an email to me GD stated : "Drop down O2-a non-starter. It is heavy and expensive and only gives you FL270."