Product Refresh Dates

The latest refresh dates for OS MasterMap Topography Layer data

The information supplied here is replicated in full on the Product Refresh Dates page, alongside publication information for all of our other Premium and OpenData products.

Delay to OS MasterMap Topography Layer product refresh

We are currently experiencing a delay in publishing the next release of the OS MasterMap Topography Layer, planned for 1 September 2025. For more information and further updates, please see the OS MasterMap Topography Layer Known Data Issues and Service Disruptions page.

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
01 September 2025	14 August 2025
13 October 2025	25 September 2025

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

Publication Date	Extraction Date
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
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