Relatives of two-year-old Libby Dor, killed when flames tore through her home, have told of their heartbreak at the loss of a "cheeky little monkey with a big smile".

Libby's mother, Hayley Osborne, 22, and four-year-old brother Kai were hurt when their home in Mendip Road, Worthing, was engulfed in fire.

A 17-year-old staying at the flat was also injured as he scrambled to escape.

Libby's grandfather Paul Osborne said: "Everyone is going to miss her."

Neighbours tried to save Libby but were beaten back by heat and flames from the ground-floor flat.

Ms Osborne and Kai scrambled to safety through a smashed window. She is still in Worthing Hospital and has been told of her daughter's death.

Mr Osborne, 43, from Worthing, went to the scene as flames tore through the flat.

He said: "There were ambulances, police and firefighters everywhere. We were not allowed to get anywhere near.

"I knew my daughter was in hospital with Kai. My concern was for Libby, I knew she was still trapped inside.

"Everything was taking too long. I felt inside that I wasn't going to see her again. It's devastating. Libby was such a happy-go-lucky girl, cheeky as a monkey, a normal little two-year-old who was just developing her own character.

"She was confident, always smiling. She loved to play with toy frogs and Barbie dolls and watch the Tweenies on TV.

"Family and friends have rallied. Everyone is gutted and devastated. We will miss her. I will remember just walking with her. She came up to my knees and I would keep ready to make sure she didn't fall over.

"I sit at home now and keep thinking Libby's head will pop up round my chair and she'd say 'Grandad, Grandad' like she used to."

Libby's grandmother Kim, 45, said: "It's like a bad dream. Libby was a loving, caring child who always wanted to hug you."

She has twice visited the scene of the fire to lay flowers.

Kai was today being cared for by relatives as he waited for his mother to be released from hospital.

It is believed the children's father lives in London.

Fire experts continuing their investigation into the cause of the blaze said one possibility was that Libby was playing with matches in her bedroom, where the fire started.