Women are happier without children or a spouse, says happiness expert

Behavioural scientist Paul Dolan says traditional markers of success no longer apply

We may have suspected it already, but now the science backs it up: unmarried and childless women are the happiest subgroup in the population. And they are more likely to live longer than their married and child-rearing peers, according to a leading expert in happiness.

Speaking at the Hay festival on Saturday, Paul Dolan, a professor of behavioural science at the London School of Economics, said the latest evidence showed that the traditional markers used to measure success did not correlate with happiness - particularly marriage and raising children.