Miss Geeson was last seen leaving a New Year's Eve party

Miss Geeson, 22, was reported missing by a flatmate after she failed to return home from New Year's Eve party at a Cambridge pub.

Her friend Rebecca Beadle said: "I don't think she'd have got in a car with someone she didn't know."

A taxi driver who said he had picked up a woman resembling Miss Geeson later retracted his statement.

He originally told officers he had collected her in Cambridge early on New Year's Day and dropped her at a pub near her home in the city's Brookfields area.

Behaviour 'not malicious'

A police spokeswoman said on Friday the driver had been questioned about why he had changed his mind.

Officers concluded he had made a mistake and his behaviour had not been malicious.

"He has been questioned again but will face no further action," she said.

Police have called in a forensic telephone expert who worked on the Soham murder case to help them analyse text messages sent by Miss Geeson.

One sent at 0142 GMT said simply: "Please help me x".

Miss Geeson, a student at Anglia Polytechnic University and whose family comes from Southend in Essex, had been at a New Year's Eve party with a male friend.

It is thought she left the city centre Avery pub with the friend to buy fish and chips. Miss Geeson then disappeared when her friend intervened in a group involved in a fight.