Big Brother most memorable moments as show marks its 25th anniversary

It has been 25 years since the first series of Big Brother hit TV screens in 2000, captivating the British public and becoming an instant classic. Deemed TV's 'first social experiment', the concept of contestants being locked in a house together and surveilled 24 hours a day was at that time a baffling one. Famous for its controversial and sometimes scandalous moments, Big Brother was responsible for some of the wildest scenes to ever grace British TV screens - including a Pamela Anderson cameo.From Nasty Nick and the late Nikki Graheme's iconic 'Who is she?' rant to THAT hot tub scene between Anthony Hutton and Makosi Musambasi - here are Big Brother's best bits as it turns 25.