New Underground S Stock in King's Cross St. Pancras, London, England (UK), 2013

This one of the new London Underground S Stock trains, introduced in 2010. There are two sub-classes of these with numbers, S7 and S8. The S8 Class are actually a bit older, as the S7's weren't introduced until 2012. I'm pretty sure this is an S7, as S8's only work on the Metropolitan Line.