He said: "In a way it would be nice to go back in and get a break from it all - life is much simpler in there."
In the new show, some of the most popular housemates from the past 11 series - including this year's winner - will re-enter the compound for a two-week TV special.
Cage fighter Alex was eventually forced to turn down the offer because he needs to spend six hours a day training for a fight with Tom 'Kong' Watson on September 25.
He told Star magazine: "I'd have had to ask producers to give me a few hours a day to train anyway, and I am not sure they would have been keen on the idea- not the most entertaining viewing, I suppose!"
Gritty and involving, this small British thriller is like Memento crossed with The Bourne Identity...