Average GPS coordinates for Upton Postcode location: 51.548, -0.941. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Upton on map:

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Listing cities & postcodes (2):
>> Berkshire, OX11 Upton, England, GPS coordinates: 51.5774,-1.2613
>> Berkshire, SL1 Upton, England, GPS coordinates: 51.5177,-0.6215