Today in Focus

The Houthis now control the Bab al-Mandab strait. But where is it and why does it matter? Patrick Wintour explains. Help support our independent journalism at theguardian.com/infocus

The German chancellor, Friedrich Merz, has vowed to stay in office despite heavy losses in two state elections that he described as a ‘disaster’. The anti-immigration, Kremlin-friendly Alternative für Deutschland won with 38% of the vote in Mecklenburg-Western Pomerania, while the leftwing Die Linke was victorious in Berlin. Merz has promised political change, but speculation is growing that his party could soon oust him. Lucy Hough speaks to the Guardian’s Berlin correspondent, Deborah Cole – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

From hospital wards to bathrooms, where is a transgender person supposed to go after the latest equalities guidance?. Help support our independent journalism at theguardian.com/infocus

Buckingham Palace has issued a rare, and strong, rebuttal to claims made in Earl Spencer’s memoir Swan Song. The book claims that King Charles told Spencer days after Diana’s death and during a heated row over funeral arrangements: ‘Rest assured, we’ll forget her soon enough.’ Lucy Hough speaks to the Guardian’s senior national news editor, Aaron Sharp. Help support our independent journalism at theguardian.com/infocus

Can you have a happy, healthy relationship of three? Today in Focus hears about good and bad throupling experiences. With reporting from Kitty Drake. Help support our independent journalism at theguardian.com/infocus