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This requires alphagov/tech-docs-gem#214 to be released first - the current version of the tech docs template doesn't support row headers in markdown tables.
Alternatively we could document that you need to use HTML tables to set row level headings.
Context
Sometimes, tables have row-level headings as well as column level headings.
To be accessible, these need to be marked up as
<th>
tags. Otherwise users of screen readers and other assistive technology may not be able to work out that they're table headings rather than ordinary table cells.This came up in a recent accessibility report.
Changes proposed in this pull request
Document how to use row level headers in markdown tables (alphagov/tech-docs-gem#214 needs to be released first).
Guidance to review