Big Brother‘s Alexandra De Gale has been exposed as a racist school bully who was expelled twice for drug-taking and getting pregnant, former pupils have claimed.

Ex-student Zoe Dunn told The Sun: “Alex bullied me at school for years. She used to call me white trash, white slag. She hung around with about 20 girls and was the ringleader.

“One time the gang beat me, they really laid into me, kicking me on the floor.”

Alex was first expelled aged 13 from St Mary’s Catholic High School in Croydon, South London, after being caught smoking cannabis in toilets with pals. Ex-pupil Alex Brett said: “It was a big deal at school when it happened.”

Alex then moved to nearby Westwood High School – but was expelled from there when she became pregnant with daughter Justine, now seven.

Zoe continued: “She was chucked out aged 15 when she fell pregnant. My blood boils when I see her on TV – she’s worse than ever.”

The revelations come as complaints about Alex’s aggressive behaviour towards her housemates top 750.

In her latest outburst, Alex yelled at Rex for taking her lighter without permission, claiming she felt ‘violated’.

Angry Alex told Big Brother: “I’m getting really p****d off with Rex trying to touch my stuff and dictate to me. I can’t take him anymore. Is he allowed to just violate my stuff?”

Viewers have been complaining since Tuesday, when Alex raged at Rebecca for burning a chip supper and made Rachel cry.

Telly watchdog Ofcom has received 505 calls while Channel 4 itself has taken a further 250. And anti-bullying groups have slammed the channel for not taking any action.

Liz Carnell, director of Bullying UK, said: “I’m sure Channel 4 is delighted with the controversy it’s caused, but it sends out a message to young people. The aggression shown is unacceptable.”

A Channel 4 spokeswoman said: “We are closely monitoring the situation and will take any appropriate action.”