Trains and Tones at Clapham Junction, (BML/SWML), 02/09/22,

Clapham Junction is a major railway station and transport hub near St John's Hill in south-west Battersea in the London Borough of Wandsworth. It is 2 miles 57 chains (2.71 mi; 4.37 km) from London Victoria and 3 miles 74 chains (3.93 miles) from London Waterloo;[4] it is on both the South West Main Line and Brighton Main Line as well as numerous other routes and branch lines passing through or diverging from the main lines at this station. Despite its name, Clapham Junction is not located in Clapham, a district situated approximately 1 mile (1.6 km) to the south-east and is instead sited in Battersea.

Routes from London's south and south-west termini, Victoria and Waterloo, funnel through the station, making it the busiest in Europe by number of trains using it: between 100 and 180 per hour except for the five hours after midnight. The station is also the busiest UK station for interchanges between services, and the only railway station in Great Britain with more interchanges than entries or exits.

The station is named Clapham Junction because it is at the junction of several rail lines. The name is not given to any rail junction near the station which, without end-on intercompany junctions, are:

Falcon Junction at the south end of the station, where the West London Line (WLL) joins the Brighton Slow Lines
Ludgate Junction at the eastern end of the Windsor Line platforms to the WLL
Latchmere SW Junction connecting the WLL to the Windsor lines at Ludgate Junction.
Latchmere Main Junction connecting the WLL to the Brighton Line at Falcon Junction.
West London Extension Junction and Junction for Waterloo, re-laid for Eurostar empty-stock moves from the Windsor Lines to the WLL.
Pouparts Junction where the low-level and high-level approaches to Victoria split.