Large open area in south east London that’s been a park since 1878 . It’s over 200 acres and is half in Wandsworth and half in Lambeth. It’s used for all manner of sporting events, particularly football and angling, and twice yearly for a large funfair. It’s best known to music fans as the location for the dance music festival South West Four aka SW4. Since 2014 it’s also the home of the rock music The Calling Festival which was formerly held in Hyde Park under the name Hard Rock Calling. Closest tube (for events) is Clapham Common.