4 December 2012 Last updated at 13:59 ET

Mother fears missing Croydon girl 'snatched'

Lisa and Tony Pratt described their daughter as a "typical teenager"

The parents of a 14-year-old girl missing from Croydon, south London, for almost four weeks, say they believe their daughter has been "snatched".

Shelley Pratt was last seen on 8 November.

Lisa and Tony Pratt said new CCTV footage images from a tram station in George Street, Croydon, taken at about 23:00 that day are "100% her".

Police believe she may be with a friend or boyfriend but said they were concerned about her safety.

'Really worried'

Until the latest footage, the last sighting of the teenager was when she got off a bus outside the Harris Academy in South Norwood at about 15:30 GMT.

Shelley's parents are "100%" certain the CCTV image is that of their daughter

She walked down Portland Road with another girl and a boy.

She was wearing a dark purple hooded jumper with the slogan 'I [heart symbol] London.'

Mrs Pratt who last saw her when she left for school, said: "We're really, really worried now."

She added that her hunch was that someone had taken her.

"I reckon someone's got her. She's such a pretty girl. She looks older than 14."

They described their daughter, as a "typical teenager", the "joker" in their family of six children, with a tendency to be "argumentative".

They said her disappearance had had a big impact on the whole family.

Det Ch Insp Mark Dunne said: "We've spoken to all her friends but have so far drawn a blank.

"We suspect that she may well be in a position with a friend or boyfriend and finding it hard to extricate herself."

He said he had the impression she was vulnerable and an attractive 14-year-old girl who may look older than she is.

He added: "It's a combination of those factors that make us very concerned now for her well-being and safety."