Hammersmith & City line. _ S Stock (Replaces C Stock)
The S Stock was designed to cope with the increasing strain on the older sub - surface lines of the tube network.
Unlike other trains, it has air conditining and articulated middles, meaning you can walk beetween carridges freely.
the S Stock, the newest train on the network, shares its style with the 2009 Stock, both being part of bombardiers "Movia" family