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Half of all women have a fall-back partner on call should their current relationship turn sour, it emerged today.
A substantial percentage have kept another man in mind in case they end up single.
And married women are more likely have a Plan B in the background than those who are just in a relationship.
It also emerged the back-up is likely to be an old friend who has always had feelings for the woman in question.
But other candidates are an ex-boyfriend or ex-husband, a colleague - or someone who they have met at the gym.
One in five said they were confident he would 'drop everything' for her, if she asked him to
The survey of 1,000 women also found Plan B is also likely to be someone whom she has known for around seven years, who will be 'ready and waiting' because of 'unfinished business'.