📅Product Refresh Dates

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.

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​
OS MasterMap Greenspace Layer	Bi-annually	April and October
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​
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​

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
116	06 February 2025	03 January 2025
117	20 March 2025	14 February 2025
118	01 May 2025	28 March 2025
119	13 June 2025	09 May 2025
120	31 July 2025	27 June 2025

Past AddressBase epoch publication and data cut dates

Epoch Number	Publication Date	Data Cut Date
115	19 December 2024	14 November 2024
114	07 November 2024	03 October 2024
113	26 September 2024	23 August 2024
112	15 August 2024	11 July 2024
111	27 June 2024	23 May 2024
110	16 May 2024	11 April 2024
109	05 April 2024	29 February 2024
108	22 February 2024	18 January 2024
107	05 January 2024	30 November 2023
106	23 November 2023	19 October 2023
105	12 October 2023	07 September 2023

• AddressBase product 'family' release notes (for all AddressBase products bar AddressBase Core) are available from the AddressBase Core Principles 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
03 February 2025	16 January 2025
17 March 2025	27 February 2025

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 December 2024	28 November 2024
04 November 2024	17 October 2024
23 September 2024	05 September 2024
12 August 2024	25 July 2024
24 June 2024	06 June 2024
13 May 2024	25 April 2024
02 April 2024	14 March 2024
19 February 2024	01 February 2024
04 January 2024	14 December 2023
20 November 2023	02 November 2023
09 October 2023	20 September 2023

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