Making a comedy about the Nazis is a bold and immensely dangerous undertaking. For every example of it working, usually at a slight remove – as in the case of Mel Brooks’ The Producers – there is another Life is Beautiful, a tone-deaf wallow in cheap sentiment and jaw-droppingly inappropriate moments of levity. Some directors, such as Quentin Tarantino, simply serve up bloody wish-fulfilment instead, but Taika Waititi has set out his stall with Jojo Rabbit to make what can only be described as a very serious farce. If it doesn’t entirely work, then at least its ambition is laudable. Its execution is about as accomplished as one could have hoped for.