What London Underground stations have an island platform?
Although there are several stations served by London Underground trains that have an island platform (eg South Kenton), just 2 are deep level.
There are only 2 stations on the London Underground network that have island platforms. Both of them are on the Northern Line. These are Clapham North and Clapham Common. The close proximity of the two running railway lines makes them a hazard during peak times, and it can actually feel quite intimidating when trains on both sides are moving.
Clapham North is situated between Stockwell and Clapham Common, in fare zone 2. Train services run from Mordern to Edgeware via Charing Cross or Bank branch and High Barnet. Clapham North typically sees around 6.5 million entries/exits per year (based on last 5 year figures).
The second of the two London Underground stations with an island platform, is Clapham Common. Clapham Common is located just one stop south on the Northern Line from Clapham North.
Both Clapham Common and Clapham North have a staircase at the south end of the platform to the station exists.