AddressBase Premium Islands
Here you will find all documentation for the AddressBase Premium Islands product.
AddressBase Premium Islands provides the most detailed view of an address and its lifecycle for Northern Ireland, Channel Islands and the Isle of Man. It has more records than AddressBase Plus Islands as it provides all the information relating to an address or property from creation to retirement.

Addressing outside of Great Britain
For the first time, AddressBase customers can access over 1 million extra records complete with the Unique Property Reference Number (UPRN), outside of Great Britain. Get a three-month free trial of AddressBase Islands data by signing up to our Data Exploration Licence.
Boost your marketing ROI
AddressBase Islands means you can run successful national campaigns - or build awareness in new markets, targeting households in properties converted into flats, for example.
Available in two versions
AddressBase Islands is available in two versions, allowing you to attach it to your existing GB AddressBase product, whether that's AddressBase Plus or AddressBase Premium.
Straightforward licensing
We offer the same style of licence for AddressBase Islands as existing AddressBase products. This ensures you can use your AddressBase Islands data in a consistent way across the United Kingdom and Crown Dependencies.
Consistent property information
For major businesses offering household services nationwide, taking AddressBase Islands means you have consistent property information for Northern Ireland, the Channel Islands and the Isle of Man on tap from a single source.
Reliable records
in the busy call centre environment, your staff will always get results no matter where the address is located, and because our data is regularly updated, your records will be more reliable, too.
Access: Download
Data theme: Address
Data structure: Vector – Points
Coverage: Northern Ireland, Channel Islands and Isle of Man
Scale: 1:1 250 to 1:10 000
Format: CSV, GeoPackage, GML 3.2.1
Ordering area: Full Islands Set
Paying Royal Mail royalties as a commercial customer
Royal Mail royalties are included into the licence fee if you are already a Great Britain AddressBase product customer. Additional Royal Mail royalties will apply if you aren't an existing Great Britain customer.
Differences between the two AddressBase Island products
There are two AddressBase Islands products: AddressBase Plus Islands and AddressBase Premium Islands.
AddressBase Plus Islands contains current properties including addresses sourced from Local Authorities, Ordnance Survey and Royal Mail, all provided with a UPRN (Unique Property Reference Number), for Northern Ireland, Channel Islands and the Isle of Man. The product enables the end-user to locate an address or property on a map using either X, Y coordinates supplied on a British National Grid or Latitude and Longitude coordinates provided on an ETRS89 projection.
AddressBase Premium Islands provides the most detailed view of an address and its lifecycle for Northern Ireland, Channel Islands and the Isle of Man. It has more records than AddressBase Plus Islands as it provides all the information relating to an address or property from creation to retirement. The product contains Local Authority, Ordnance Survey and Royal Mail addresses. This includes provisional addresses (proposed planning developments), and historic information (demolished properties) where available.
Ordnance Survey addresses are added to the AddressBase Premium Islands product where necessary to ensure the schema meets the core AddressBase products.
Royal Mail's Postcode Address File
The Islands products contain Royal Mail's Postcode Address File (PAF). This is a vital component of both Islands products. Royal Mail information will therefore be present where a match can be made between the Local Authority address and an address from Royal Mail.
Data from Royal Mail’s PAF
The database is a vital component of the single address gazetteer database and is in each of the AddressBase products where there has been a match confirming the address to the LLPG address.
How to get this product
Access to this product is free for PSGA (Public Sector Geospatial Agreement) Members. You can check if your organisation is a member of the PSGA on the OS website.
The AddressBase Premium Islands product page on the OS website has advice on how to get the product for businesses, developers, OS Partners and PSGA Members (i.e. government and the public sector).
Other ways to access this data
AddressBase Premium Islands data is available from our OS Places API and OS Match & Cleanse API, providing up-to-date information relating to an address or property from creation to retirement. Visit the OS API docs site to unlock programmatic access to rich geospatial data and integrate OS data and services into your applications
Access to UK address data is also available through the OS NGD Address theme, providing data that is interoperable with other OS NGD themes, up to daily currency, and a data schema designed to be simple to use and interrogate. Users may find OS NGD address data more accessible and easier to use with databases and GIS software. Visit the OS NGD docs site to discover how to access the OS NGD and learn what's available to users.
What's next?
To access documentation and resources relating to this product, please refer to the following:
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