Police have revealed the last text message sent by missing teenager Alice Gross, who disappeared two weeks ago.
The 14-year-old sent the message to her dad Jose just two hours before she disappeared.
Her text asked her father if he was home from work to let her in because she had forgotten her key.
In a major new appeal Scotland Yard said the text was sent from Alice's white iPhone 4S which was missing from her rucksack later found abandoned on a path near a canal.
The phone has not been switched on since the 14-year-old disappeared two weeks ago today after she went for a walk from her home in Hanwell, West London.
The last communication was an automatic connection with the Internet just after 5pm after which it went dead.
In another development they revealed that the 'Vans' trainers she was wearing when she left home were found in her rucksack.
Detectives say they are still treating Alice's disappearance as a missing persons inquiry, despite growing fears for her safety.
Articles continues after this video.
Police said two builders had found her bag abandoned on a path near the River Brent the day after she disappeared.
They looked inside but put it back under some undergrowth where they found it and it was only discovered four days later.
Detective Chief Inspector Andy Chalmers, who is leading the investigation, said: "We know that Alice's bag was first found the day after she was last seen by two builders, who we have spoken to, who put it back down in the same spot on the towpath."
They say one possibility is that Alice, who suffered from anorexia, had a crisis as she walked home and has run away.
DCI Chalmers said: "What we do not know is if anyone saw or found Alice's bag between when she was last caught on CCTV and when the builders found it.
"I need to know if anyone found Alice's bag before the builders and was anything taken from it, or if anyone has her iPhone. Did you find or see a white iPhone 4s with a cracked rear case, that Alice had decorated with marker pen? If you did do you still have it.
"I can assure you that if you did or you know someone that did, you are not in trouble, but you may have vital information that can take us one step further to finding Alice."
The bag also contained her empty lunchbox, a clean pair of knickers and some correspondence from school.
The schoolgirl left home at 1pm on August 28 telling he family she was going for a walk with friends and would be back in the evening.
Instead, she went for a walk alone along the Grand Union Canal towpath and was caught on CCTV near the Holiday Inn at Brentford Lock walking towards Kew and then later at 3.45pm at the same spot walking back.
The last sighting of her is on CCTV at 4.26pm at the Trumpers Way canal bridge where three cyclists where sheltering from a rain shower.
Police have still not traced these three cyclists or two others who passed them at the same time.
DCI Chalmers said "There was a reason why Alice may have considered running away, she was going through a difficult period in her life but it was a loving family and they were coping together.
"But the longer this goes on the more concerns there are for her safety. The family are completely utterly distraught, they are desperate for Alice to contact them or just let them know she is safe."
He added:"There has been speculation that a family disagreement sparked Alice's disappearance. It didn't.
"Alice went out that day just like usual."
In a statement Alice's parents Jose and Rosalind said: "We all dearly love and miss Alice, not only her whole family but also her friends, teachers and the wider community. The past two weeks without her have been heartbreaking.
"Alice if you see or hear our appeals please let us know you are ok. We think about you constantly and are desperate for you to come home."
Two men, aged 51 and 25, have been arrested on suspicion of murder but both have been released.
The older man has been eliminated from inquiries but police are still investigating the 25-year-old who is on bail.
Alice is white, 5 ft 2ins tall and of very slim build with shoulder-length, light brown hair.
Anyone with any information is asked to contact the investigation team on 020 8358 0100, or call Crimestoppers anonymously on 0800 555 111.