📅Product Refresh Dates

Update schedules for all of the OS Download data products.

On this page, you'll find information about the update frequencies of our Premium and OpenData Download products and the calendar months in which these updates are published.

You'll also find tables listing the upcoming and past publication and data cut / extraction dates for our AddressBase and OS MasterMap Topography Layer products.

For OS National Geographic Database (OS NGD) currency information, please see the Data ordering and currency page on the OS NGD Documentation site.

Premium data product update frequencies

Product​	Update Frequency​	Publication Month​
1:25 000 Scale Colour Raster​	Quarterly​	March, June, September and December​
1:50 000 Scale Colour Raster​	Quarterly​	March, June, September and December​
AddressBase	Every six weeks	Variable
AddressBase Core	Weekly	Weekly publications in January, February, March, April, May, June, July, August, September, October, November and December
AddressBase Plus	Every six weeks	Variable
AddressBase Plus Islands	Every six weeks	Variable
AddressBase Premium	Every six weeks	Variable
AddressBase Premium Islands	Every six weeks	Variable
Code-Point​	Quarterly​	February, May, August and November​
Code-Point with Polygons​	Quarterly​	January, April, July and October​
OS Emergency Services Gazetteer	Monthly	January, February, March, April, May, June, July, August, September, October, November and December
OS Detailed Path Network​	Annually​	October​ (see warning note below the table)
OS MasterMap Greenspace Layer	Bi-annually	April and October (see warning note below the table)
OS MasterMap Imagery Layer​	Quarterly​	February, May, August and November​
OS MasterMap Highways Network​ – Paths	Monthly​	January, February, March, April, May, June, July, August, September, October, November and December
OS MasterMap Highways Network​ – Roads	Monthly​	​January, February, March, April, May, June, July, August, September, October, November and December
OS MasterMap Highways Network – Routing and Asset Management Information (RAMI)	Monthly	​January, February, March, April, May, June, July, August, September, October, November and December
OS MasterMap Sites Layer​	Bi-annually​	April and October​
OS MasterMap Topography Layer	Every six weeks	Variable
OS MasterMap Topography Layer – Building Height Attribute	Bi-annually​	April and October​
OS MasterMap Water Network Layer​	Quarterly​	January, April, July and October​ (see warning note below the table)
OS Multi-modal Routing Network	Monthly	January, February, March, April, May, June, July, August, September, October, November and December
OS Terrain 5​	Quarterly​	January, April, July and October​
OS VectorMap Local​	Quarterly​	January, April, July and October​
OS VectorMap Local – colour backdrop​	Quarterly​	January, April, July and October​
Points of Interest​	Quarterly​	March, June, September and December​

Products reaching End of Life (withdrawal)

• OS Detailed Path Network: Please note that the October 2025 release was the final release of the OS Detailed Path Network product; more information about the product withdrawal timeline and the recommended product migration pathway is available from the End of Life Notice – Detailed Path Network page.

• OS MasterMap Water Network Layer: Please note that the January 2026 release will be the final release of OS MasterMap Water Network Layer; more information about the product withdrawal timeline and the recommended product migration pathway is available from the End of Life Notice – OS MasterMap Water Network Layer page.

• OS MasterMap Greenspace Layer: Please note that the October 2026 release will be the final release of OS MasterMap Greenspace Layer; more information about the product withdrawal timeline and the recommended product migration pathway is available on the End of Life Notice – OS MasterMap Greenspace Layer page.

OpenData product update frequencies

Product	Update Frequency	Publication Month
1:250 000 Scale Colour Raster	Annually	June
Boundary-Line	Bi-annually	May and October
Code-Point Open	Quarterly	February, May, August and November
GB Overview Maps	Annually	January
MiniScale	Annually	January
OS Open Built Up Areas	Every 2 years	April
OS Open Greenspace	Bi-annually	April and October
OS Open Linked Identifiers	Every six weeks	Variable
OS OpenMap – Local	Bi-annually	April and October
OS Open Names	Quarterly	January, April, July and October
OS Open Rivers	Bi-annually	April and October
OS Open Roads	Bi-annually	April and October
OS Open TOID	Every six weeks (in-line with the OS MasterMap Topography Layer releases).	Variable
OS Open UPRN	Every six weeks (in-line with the AddressBase Epoch dates)	Variable
OS Open USRN	Monthly	January, February, March, April, May, June, July, August, September, October, November and December
OS Open Zoomstack	Bi-annually	June and December
OS Terrain 50	Annually	July
OS VectorMap District	Bi-annually	May and November

AddressBase products

AddressBase, AddressBase Plus, AddressBase Premium and AddressBase Islands are updated every six weeks. This six week period of time is known as an epoch.​

Our AddressBase products are currently available as a Full Supply or Change-Only Update (COU) for each epoch.​

Upcoming AddressBase epoch publication and data cut dates

Future dates are provided as an indication only and are subject to change. Data cut dates are estimates; these are given to provide an indication of the last point at which changes will reach the epoch. ​

As we approach the publication date and prepare to release a new epoch, any new requests placed for data will be paused to ensure data integrity. These requests will be processed as soon as this pause is lifted.

Epoch Number	Publication Date	Data Cut Date
126	02 April 2026	27 February 2026
127	14 May 2026	10 April 2026
128	25 June 2026	22 May 2026

Past AddressBase epoch publication and data cut dates

Epoch Number	Publication Date	Data Cut Date
125	19 February 2026	16 January 2026
124	08 January 2026	05 December 2025
123	27 November 2025	24 October 2025
122	16 October 2025	12 September 2025
121	04 September 2025	08 August 2025
120	31 July 2025	20 June 2025
119	12 June 2025	09 May 2025
118	01 May 2025	28 March 2025
117	20 March 2025	14 February 2025
116	06 February 2025	03 January 2025
115	19 December 2024	14 November 2024

• AddressBase product 'family' release notes (for all AddressBase products bar AddressBase Core) are available from the AddressBase Fundamentals pages of this site.

• AddressBase Core is supplied weekly and its release notes can be found on the AddressBase Core Release Notes page.

OS MasterMap Topography Layer

Upcoming OS MasterMap Topography Layer publication and extraction dates

The table below lists our future schedule of extraction and publication dates for OS MasterMap Topography Layer. We aim to keep this schedule up to date, but you should treat these dates as a guide only as they are subject to change. The extraction date will be confirmed on the publication date.​

Please note, these dates only apply to bespoke polygons, area of interest (AOI) orders and national sets.

Publication Date	Extraction Date
30 March 2026	12 March 2026
11 May 2026	23 April 2026
22 June 2026	04 June 2026
03 August 2026	16 July 2026
14 September 2026	27 August 2026
26 October 2026	08 October 2026
07 December 2026	19 November 2026
18 January 2027	24 December 2026
01 March 2027	11 February 2027
12 April 2027	25 March 2027

Past OS MasterMap Topography Layer publication and extraction dates

The table below lists past publication and extraction dates for OS MasterMap Topography Layer:

Publication Date	Extraction Date
16 February 2026	29 January 2026
06 January 2026	11 December 2025
24 November 2025	06 November 2025
13 October 2025	21 September 2025
03 September 2025	14 August 2025
30 July 2025	10 July 2025
09 June 2025	22 May 2025
28 April 2025	10 April 2025
17 March 2025	27 February 2025
03 February 2025	16 January 2025
16 December 2024	28 November 2024
04 November 2024	17 October 2024
23 September 2024	05 September 2024
12 August 2024	25 July 2024

OS MasterMap Topography Layer release notes are available from the product pages of this site.