Erm...I did what?

It starts out as a few drinks after work and ends up as a splitting hangover the morning after.

Now, more and more single women are forgetting what they got up to inbetween because they are drinking so much, new research shows.

Two thirds admit waking up after a night on the town with almost no recollection of what happened.

Two years ago, the figure was fewer than half, the survey found.

More frequent binge drinking is behind the increase, with two thirds of singletons downing most of their 21-unit recommended maximum weekly intake in one or two sessions, Company magazine found.

Half admitted they sometimes had no idea how they got home - up from a third in 2001.

Worryingly, one in ten said they were escorted home by a stranger.

'It seems women are becoming less safety conscious, which is extremely worrying,' said editor Sam Barker of the Freedom Years survey.

'When it comes to romance or career, young women have their heads screwed on right but their relationship with alcohol is a different story altogether.'

She advised making better plans, such as booking a taxi home for the end of the night.

The figures, from a survey of 1,000 single women aged 18 to 28, showed a worrying trend, said the Portman Group, which promotes responsible drinking.

'Heavy drinking risks problems such as cirrhosis of the liver,' said chief executive Jean Coussins.