Paddington Underground Station, Picture 3, London, England (UK), 2014

This train appears to be a C-Stock train, which is a 4-rail EMU (like all modern London Underground trains). I didn't see the builder plates on this one (looking on the doorsills also helps), but these were built in two batches in 1977-1978, and 1990-1994. These trains are too tall to use on the newer "tube" underground lines that have been bored 200 feet below the streets since 1890. Instead, they operate on the former steam, or "widened" lines.