At the end of the 17th century, a Swiss physician diagnosed a deadly new disease - nostalgia. Agnes Arnold-Forster explores the surprising cultural history of the emotion, from the longing "Ostalgie" felt for a lost East Germany to the Victorian love of all things medieval. Speaking to Ellie...

As the Second World War raged on, Atlantic sea-routes became a crucial lifeline for Britain as merchant ships kept them supplied with critical equipment and food. But this made them an irresistible target for German attack. Speaking to Rachel Dinning for our WW2's Greatest Battles series,...