BP Big Screens continue with a broadcast on Tuesday evening starting 7pm: *July 15 - La Boheme - Angela Gheorghiu/Vittorio Grigolo/Massimo Cavalletti/Irina Lungu
If you're in London, go to Trafalgar Square. If you're in another city, check out the location listing on big screens around UK.
While in London, I spotted a few ads in the underground.