Google map geocoding for the UK

Those of you based in the UK who have created Googlemap mash ups in your umbraco sites or any other site for that matter, may have come across geo coding issues for UK post codes.  In some instances they can be out by quite a bit.  The actual google website is accurate however doing a look up via the api sometimes is not.  Its all to do with Royal mail licensing. Anyhow there is a hack and it works see here.