By Sarah Tetteh Prince Harry and Meghan Markle are said to have ‘held talks’ over what to do if their efforts to fix their royal feud fails. It comes as Harry has let it be known he is on standby to return to England should his family need him amid their health woes. The Duke of Sussex flew straight to London earlier this month as soon as it was announced his father King Charles was diagnosed with cancer on February 5. For all the latest on news, politics, sports, and showbiz from the USA, go to The Mirror US. READ MORE: Prince Harry risks losing his Royal titles in effort to become a US citiz…