What you need to call:

http://easygeo.uk/api.php?q=Colchester,+UK

What you will get:

51.895927,0.891874

About Easy GEO

Easy GEO exists to make geocoding and reverse-geocoding simple and painless. It does both with a simple call to a URL. What’s returned is either a comma delimited (good for use in Google Maps as-is) latitude/longitude pair. If you’re reverse-geocoding it will take a set of lat/long coordinates and return the closest nameable point (usually an address). That’s it. Simples!

Feel free to send me your suggestions and queries @puneetkay.

Data © OpenStreetMap contributors, ODbL 1.0.