Distortion Brewery Taproom

Jezza says

The tanks provide a striking centrepiece to the tap room, which is otherwise a standard railway arch brewery tap. The beer range is expanding and they now offer around half a dozen of their own beers. Note, as well as the nearby Overground stop, you can easily get a bus from either Vauxhall or Clapham Junction. It's roughly half way between the two.

Steve says

Another smart brewery and tap room in a railway arch. 6 draft beers are available served straight from the shiny tanks behind the bar. The brewing kit is located beyond these. Beers are all named with a space theme and are good examples of respective styles.