[malern]

The available columns are

Postcode, IntroductionDate, GridRefEast, GridRefNorth, County, District, Ward, UserType, GridStatus, Country, WardStatus, NHS_Code, NHS_Region, Long, Lat, OSRef, Update

You can already get the co-ordinates from a postcode using google maps. So I can't think of anything massively exciting you could do with this information. Maybe some sort of offline navigation app.

[skwiddor]

how about "what postcode am I in"? when out and about.

also "click on the map, what's the postcode?"

quite handy for getting the area code i.e N1

[pyre]

If those are the columns this isn't 'precise' postal code data. The log/lat is just the 'centroid' of the postal code. At least in the US, most -- if not all -- postal codes are irregularly shaped, so it's not like you can pull up precise GPS data on the perimeter of the postal code (i.e. in order to draw it on a map).