Just spoke to someone different at Orange and they were a bit more knowledgeable! Apparently Orange didn't start the production of their nano-sims until yesterday when it was confirmed by Apple so they have none in stock as of yet. However she did say that they don't have an official date but the orders for nano sims will most likely be on or before the 21st, not in October as the previous person said. She also said that Orange / EE will probably announce the dates and availability of iPhone 5 specific tarrifs within the next couple days.
Oh and switching my contract onto a nano sim will be free, sorted!
Oh and switching my contract onto a nano sim will be free, sorted!