Clapham Junction Railway Station London is not in Clapham but in Battersea.
Each day about 2,000 trains, most stopping, pass through the station, more than through any other station in Europe. At peak times 180 trains per hour pass through. It is not the busiest station by number of passengers, most of whom (about 430,000 on a weekday) pass through. Interchanges make some forty per cent of the activity and on that basis too it is the busiest station in the UK.