Average GPS coordinates for Clapham Postcode location: 51.462, -0.138. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Clapham on map:

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Listing cities & postcodes (1):
>> London, SW4 Clapham, England, GPS coordinates: 51.4622,-0.1376