Thatcher, had her odds of winning the competition slashed after a run of betting on her.
Bookies William Hill have installed her as joint favourite to win the show at 7/4 - the same odds as former Eastenders actor Sid Owen. When the daughter of the former prime minister entered the show 10 days ago she was ranked as a 14/1 outsider.
William Hill spokesman Rupert Adams said: "Carol is proving astonishingly popular and at the moment we are taking as many bets for her as we are for all the rest put together."
wanadoo