The attack took place in a building in the grounds of the Forman Institute, in Eastbourne Road, Blindley Heath just after 7.30pm on November 7. The men, a 38-year-old man from Haywards Heath, a 34-year-old man from Slough, a 44-year-old man from Hayes and a 40-year-old man from Slough, were also arrested on suspicion of conspiracy to commit GBH and violent disorder on November 14, police said. The six men who suffered serious injuries and a seventh man injured were taken to hospital. All have now been released, police said. Police are appealing for any information which could assist their ongoing investigation. Call 101, quoting PR/P18267846. Alternatively the independent charity Crimestoppers can be contacted anonymously on 0800 555 111. Anti-Brexit campaigner Gina Miller urges young people of Sussex to ‘rise up’