Mishal Husain

Mishal Husain is not mentioned in any of the provided news articles. Therefore, it is impossible to provide a summary about her based on the given information. The articles discuss the London Book Fair, Nigel Farage's interactions with a journalist, and Amol Rajan's departure from BBC Radio 4's Today programme to start his own company. None of these events directly involve or relate to Mishal Husain.