Will Poulter and Kit Connor on bonding with head-shaving and tattoos on their film Warfare

Helen BushbyCulture reporterGetty ImagesWill Poulter and Kit Connor are part of the cast for the film Warfare, about soldiers fighting in IraqThe young cast of Alex Garland's film Warfare had to bond pretty quickly, to play a US military unit whose lives depended on each other, during the Iraq war in 2006.Familiarity was crucial, so before filming began, the cast were sent on a three-week military bootcamp. They…