The Big Brother house was placed into lockdown and security put on standby on Friday evening as an explosive fight erupted between housemates. After a tense week in the house, which ended with a shock double eviction, an argument kicked off between Trish and Paul which reportedly forced worries bosses to lock half of the contestants in the bedroom. In an attempt to keep Trish and Paul away from one another, worried execs reportedly tried to diffuse the situation by separating the housemates and keeping them in lockdown for over an hour.