GET /bng2latlong/{easting}/{northing}

Takes an OSGB36 easting and northing (British National Grid) and returns the geographically equivalent WGS84 latitude and longitude. #### A successful request returns the following fields: * status - this will be `ok` * easting - the easting provided in the request * northing - the northing provided in the request * latitude - the latitude of the converted coordinates * longitude - the longitude of the converted coordinates #### An unsuccessful request returns the following fields: * status - this will be `error` * error - an error message