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.

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

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