Jazz star Jamie Cullum treated commuters to a show-stopping performance at one of London's busiest railway stations on Tuesday (21May13). The Brit took advantage of the free piano at St Pancras International to play a short set with the National Youth Jazz Orchestra in front of hordes of travellers. Cullum played new track Momentum from his latest album, and admitted he had always wanted to have a go on the station's piano. He says, "I'm in and out of St Pancras a lot. There is a piano in the station and I've seen a lot of busking here. I've always walked past it and thought, 'I fancy playing on that'. "I thrive on the live performance, the spontaneous vibe. This kind of thing suits me well. We hadn't rehearsed with the orchestra at all - but they are a crack team of musicians. We hope we sent travellers on with a song in their hearts."