The Queen is to sign a new charter backing equal rights for women and gay people in every Commonwealth nation.
In a special ceremony to mark Commonwealth Day, she will endorse the document which includes the core values - from human rights to the rule of law - that leaders have committed to upholding.
In a pre-recorded speech to be broadcast today, the monarch will say the values of the new charter have "special emphasis" on including everyone in striving for a better future.
Read the full text and listen to the speech here:
More top news
The study by the National Childbirth Trust and National Federation of Women's Institutes found a lack of staff left some women frightened.
Extracts released by 10 Downing Street suggest Mrs May will say the UK will not settle for a "half-in, half-out" policy.
Milder for most of us