This section of the website provides data from the Martha’s Rule data collection. This data collection began in September 2024 and the first publication covered data from September 2024 to July 2025.

Please refer to the ‘Latest publication’ below for the most up-to-date information.

Comparisons to previous reports should be avoided.

These publications have been released as management information.

Latest publication

Martha’s Rule data collection:  April 2026/27 (published 11 June 2026)

Previous publications

Martha’s Rule data collection:  2025/26