Use this page to geocode a large number of addresses, postcodes or ZIP codes.
Paste them into the 'Addresses' box (each address separated by a new line), choose your options and hit
the 'Geocode' button. Then go and make a cup of tea and when you return the
'Output' box should have comma separated geocoded addresses, in latitude/longitude and easting/northing (if you've chosen the UK option).
Selecting a country increases the accuracy of geocoding.
I have only included the countries that visit this site most often, give me a shout if you require another one.
If you have a list of full UK postcodes, select 'UK (postcodes)' as this should be quicker.