Our Olympics Correspondent Simon Harris is tweeting from a briefing on the London 2012 Opening Ceremony.
Artistic director Danny Boyle (who directed the Oscar-winning film Slumdog Millionaire) is describing his vision for the show.
Danny Boyle describes opening ceremony as "elusive" and a "puzzle". @londontonight
Ceremony will combine Glastonbury with the last night of the proms. @londontonight
One end of the stadium will represent Glastonbury Tor. @londontonight