Forty years after a group of hippie squatters stormed and took over an ex-army base in Copenhagen for a permanent home, they now face the biggest challenge in their extraordinary history. The city’s new right wing government has asked the 1,000 members of the Christiania commune – the largest and longest living ‘squat’ in the world – to raise £18m in order to buy the part of the city they have run as unique self governing commune since the early 1970’s. While the members of Christiana admit they face a struggle …