Every year at Purim Jews around the world gather in fancy dress to hear a reading of the Book of Esther, which tells the story of the defeat of Haman, an adviser to the Persian king, who plotted to massacre the Jewish people 2,500 years ago, an event that was prevented by Esther’s courage. Photographers Dan Kitwood and Matthew Chattle join the celebrations among observant Jews in Stamford Hill, north London