LONDON: Princes William and Harry and their wives Catherine and Meghan — once dubbed the “fab four” — walked together behind Queen Elizabeth II’s coffin Monday, just as the royal brothers did 25 years ago for their mother Princess Diana. But with a tell-all memoir by Harry due out next year and rows reportedly behind the scenes about military uniforms and titles for his and Meghan’s children, the two couples appeared as far apart as ever. The brothers did their duty, walking side by side behind their father King Charles III and other senior members of the royal family as the coffin of their gr…