When i was in LDN a few weeks ago, a friend of mine treated me to a ticket to see the mighty Cinematic Orchestra and it was such a great gig. I wasn't dissapointed. I think there's about 7 or so members, and they are so musically talented like you've never heard or seen. They had an orchestra there too, which, as you might not have guessed, are not part of the main group - it's just their name.
Here's a link on Youtube to see one of there songs 'All that you give'. It's an awesome song.
They finished with thier amazing song 'All things to all men'. UK rapper Roots Manuva sings on it and he was the special guest that night! Flipping awesome!