I have a database with a list of address and their location as an East and North coordinate. An example is: East=431833 North=336684 Postcode=DE22 4LF
When I try to convert this address using this tool: http://www.engineeringtoolbox.com/utm-latitude-longitude-d_1370.html
The result in longitude and latitude in Google gives me a location in Africa, not England where the address actually is.
Can anyone tell me which format the East and North coordinates are in and how to convert them?