A desperate mum has appealed for her 16-year-old daughter to come home after she was reported missing more than four weeks ago.

Friends and family of Francisca Simmonds have not seen the teen since her disappearance on July 17.

Police have issued a photo of the missing girl, better known as Frankie, and CCTV footage of her in a bank, but are yet to hear locate the teenager.

Speaking to getwestlondon, her mother, who asked not to be named, said Frankie has run away before but always returned within a few days.

She said: “This past month has been horrible. In the past the longest she has been away for is five days.

“When she has a problem rather than to talk about it she tends to just run.”

Francisca Simmonds hasn't been seen since July 17

She said friends have tried and failed to contact Frankie on Instagram, and continued: “This is every parent’s worst nightmare. I’m worried sick, I’m not sleeping properly, I’m not eating properly.

“I don’t know where she is, I don’t know what happened or who she’s with or if she’s safe.”

'You're not in trouble'

And in a message aimed directly at her daughter, she said: “We miss you and love you and want you to come home.

“Your friends and family miss you, everyone misses you, and we really want you to come back home.

“You’re not in any kind of trouble, you’re not going to be told off or anything.

“I just want to hold you again.”

She said her daughter had gone to the shops on the day of her disappearance and was expected home by 4pm. She alerted police when Frankie had failed to return by 6pm.

“I’d seen her briefly that day and she didn’t really say much,” said the mum. “I don’t really think something was upsetting her or troubling her.

“The police are calling me every day, sometimes twice a day to update me, and CID is on the case 24-7.

“I just want my baby home. It’s been too long.”

Anyone with information on Francisca Simmonds’ whereabouts is asked to contact police on 101 or missing people on 116000.