Combined the 2 files are around 1.5GB and add around 30GB to the install
size of nominatim. They also increase the install time by an hour or so.
+*NOTE:* you'll need to download the Wikipedia rankings before performing
+the initial import of the data if you want the rankings applied to the
+loaded data.
+
### UK postcodes
Nominatim can use postcodes from an external source to improve searches that involve a UK postcode. This data can be optionally downloaded: