title: Google reverse geocoding - how to snap to nearest full postcode
body: <p>I am using Google's reverse geocoding functionality with the maps api v3 to retrieve postal addresses for latitude longitude (when dragging a marker around a map).  </p>
  
  <p>This is a UK application only, and part of the system requires a full, or near full, postcode to process correctly.  However the reverse geocoder regularly returns just the part of the postcode - for example "GU3", even when the actual address returned appears to be complete - for example including street and house number.</p>
  
  <p>Is there anyway, preferably google but otherwise if not, of 'snapping' the address to the nearest full postcode?</p>
  
  <p>I'm aware similar functionality exists for snapping to the nearest panorama view, but there appears to be no equivalent for postcode.</p>