Sir Kenneth Branagh's heartwarming semi-autobiographical coming-of-age story Belfast is in cinemas this weekend, and so is this Belfast interview special, featuring stars Dame Judi Dench, Jamie Dornan and Caitr\xedona Balfe - not forgetting our writer director producer Sir Kenneth - talking about their uplifting (and somehow also\nheartbreaking) film set in 1969 Belfast just as The Troubles began.