Manor houses, mega-star uncles, and The Ministry of Ungentlemanly Warfare: how Hero Fiennes Tiffin is modernising the family name

With uncles like Joseph and Ralph Fiennes, it would be easy for Hero Fiennes Tiffin to rest on his laurels, but the young actor is carving out his own identity with a hat-trick of blockbusters – and the best, it seems, is yet to come