They will be able to write anonymous suggestions for each other before posting them in a Suggestions Box. Each housemate will be given 45 minutes to choose two of their fellow housemates to write suggestions for.
Housemates are told that their suggestions will be completely anonymous and are encouraged to use this as a chance to make constructive criticisms and say things that they may find difficult to say face to face.
Suggestions will be revealed to the house later on in the day.
Big Brother, Thursday 20th June, 10pm on Channel 5