Sophie and Siavash up for BB eviction

'Big Brother' contestants Sophie "Dogface" Reade and Siavash Sabbaghpour will face the public vote for eviction - because they swore.

The two housemates were ordered to stop using expletives for five-and-a-half hours as a punishment for discussing nominations.

They were told they would be immediately put up for the public vote if they uttered a single swear word before 3pm.

To illustrate exactly which terms they were to try to avoid, Big Brother unloaded a barrage of expletives to the stunned pair.

Before failing the task, they were told: "Today you must be punished. This is not a discussion. In order to avoid facing the public vote automatically, you both must not swear until 3pm today.

"Big Brother deems the following words to be swear words," the voice then said before listing almost 30 considered to be expletives.

"If you say any word that is on that list, you will automatically face eviction on Friday.

"If you communicate anything about this punishment to your fellow housemates, you will also automatically face eviction. You are not permitted to go to bed, or sleep. Your punishment begins from the moment you leave the Diary Room."

The house will celebrate Big Brother's 10th series tomorrow with the surprise return of "Nasty" Nick Bateman.

BB1's Bateman created headlines by writing notes which he showed to contestants to influence their voting.

On Monday he will take on his former nemesis - the assault course - and pit his fitness against a current housemate.

On the same day, a group of three ex-housemates from BB3 will take part in an egg and spoon race.

A current housemate must predict the winner to succeed in this task.

Tuesday will see BB4, BB5 and BB6 revisited, while on Wednesday, Nikki Grahame and Brian Belo will each take part in a memorable task from their year.

Kris Donnelly became the sixth person to be evicted from this year's series on Friday.