Owen Boswarva's blog

Update 29 January 2026

The download containing Council Tax address data disclosed by North Northamptonshire Council in November 2025 and originally linked in the post below has been removed as of today, following receipt of further correspondence from the Council.

The Council's new position is that it made an error when it granted permission for re-use of the addresses in the Council Tax list under the Open Government Licence, because the addresses contain third party rights that the Council was not authorised to license.

You can download my correspondence with the Council to date: CT_address_list_North_Northamptonshire_Council_202502342_[NO_DATA_correspondence_only].zip (0.44 MB).

It seems likely that this change in the Council's position follows an intervention from Ordnance Survey and/or GeoPlace LLP as anticipated in my recent post.

I am seeking clarification from the Council in further correspondence and some or all of the data may be republished at a later date.

The remainder of this post is as originally published in December, with the exception of the download link.

This is the latest in an occasional series of blog posts about the campaign for open address data in the UK. Previous posts are listed at the bottom.

In this post, I make available a new open address dataset released by North Northamptonshire Council.

Background

As described in previous posts, I have recently been requesting Council Tax address datasets from a number of local authorities in England, and asking for permission to re-use the data under the terms of the Open Government Licence.

I have created a landing page on my Datadaptive site with download links and other information about the Council Tax address datasets released as open data so far:

www.datadaptive.com/addr/

Release from North Northamptonshire Council

The latest council to release its Council Tax address list is North Northamptonshire Council in the East Midlands region of England. The Council disclosed most of the requested data under the FOI Act and confirmed permission for re-use of the disclosed information under the terms of the Open Government Licence (OGL).

You can download my correspondence with the Council, including the information as disclosed: CT_address_list_North_Northamptonshire_Council_202502342.zip (9.26 MB) [link removed].

Thanks to North Northamptonshire Council's Information Governance Team for facilitating the disclosure and open licensing of this data.

The information includes some UPRNs (Unique Property Reference Numbers) but they are missing for about 78% of the properties, so I have not produced a geocoded version of this address list. The Council is looking into the missing UPRNs, and I will update this post if I receive additional information. (Update 18 December 2025: the Council has declined to supply the UPRNs corresponding to the properties on the list, for reasons too tedious to summarise here.)

Previous posts related to the campaign for open address data in the UK

Wigan Council has released its Council Tax address list as open data (9 December 2025)

Bradford Council has released its Council Tax address list as open data (8 December 2025)

Cheshire East Council has released Council Tax and LLPG address lists as open data (8 December 2025)

West Northamptonshire Council has released its Council Tax address list as open data (5 December 2025)

Brighton & Hove City Council has released its Council Tax address list as open data (4 December 2025)

Manchester City Council has released its Council Tax address list as open data (30 November 2025)

City of Wolverhampton has released its Council Tax address list as open data (28 November 2025)

Barnet Council has released its Council Tax address list as open data (26 November 2025)

Buckinghamshire Council has released its Council Tax address list as open data (25 November 2025)

Camden Council has released its Council Tax address list as open data (20 November 2025)

Dorset Council has released its Council Tax address list as open data (19 November 2025)