A 14-year-old girl from Oxford last seen at home on Friday was still missing last night.
Jessica Arthur, right, said she was going to Banbury to visit a friend but took a train to London.
But she did not return home last Fridaynight and police are now appealing to the public for help in tracing her.
The teenager is white and 5ft tall with shoulder-length dyed red hair.
When she was last seen, she was wearing jeans, brown boots and a black leather jacket.
Police say she is believed to have friends in Grays, Essex, and may have travelled there.
Anyone with information should call police on 101 or the Crimestoppers charity anonymously on 0800 555111.