These are the opening betting odds to win from Betfair. As usual, I've simplified some of the numbers for clarity:
Pauline: 5/1
Christopher: 6/1
Winston: 6/1
Mark: 15/2
Helen: 13/1
Kimberly: 16/1
Steven: 18/1
Matthew: 21/1
Tamara: 33/1
Danielle: 61/1
In general, the other bookies appear to agree with the order, with the exception that most of them have Matthew slightly ahead of Steven.