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Keep the work accurate

Corrections and contact

A changed rule, unclear assumption or boundary case is worth reporting. Useful corrections are reviewed against the underlying source and calculation.

Report an issue

Email diarmuid@verdanyx.com. Do not include account numbers, health records or other sensitive personal information.

What happens next

Reports should be reproduced, checked against a primary source and reflected in the tool's last-reviewed date when they change the result. Verdanyx cannot provide individual financial, legal, health or building-engineering advice.

Accessibility feedback

Please report the page, device, browser and assistive technology involved, along with the task that could not be completed.