A TEENAGER attacked his former partner as she was holding their one-year-old child in her arms.

Blackburn magistrates heard the child was screaming as his mother was punched repeatedly by Tyler Canavan.

She blacked out briefly and came to with her nine-year-old son shouting: "wake up mummy"

Canavan, 19, of Moorland Road, Burnley, pleaded guilty to assault and theft of an iPhone. He was remanded on bail for the preparation of a pre-sentence report and warned that all options, including custody, would be open to the sentencing bench.

Jack Troup, prosecuting, said the victim had been in a relationship with Canavan and they had a child together. She had three other children and they were all with her at home on Saturday January 2.

"The back door was open because her daughter had gone out to play in the snow and the defendant let himself in," said Mr Troup.

"She was cleaning the stairs and he came behind her, grabbed her by the hair and then punched her to the back of the head."

Mr Troup said the victim managed to get into the bedroom with her one year old and locked the door but Canavan forced his way in.

"He was shouting at her and calling her a slag and demanding to know who she had been sleeping with," said Mr Troup.

"He then punched her multiple tomes to the face. Her other children tried to get him off before she blacked out briefly."

As he left Canavan took the victim's phone. Mr Troup said there would be an application for a restraining order when the case was finalised.

David Lawson, defending, said it was conceded it was a serious offence in a domestic context and that the court would require a pre-sentence report.

He said his client, who only had one previous conviction, would accept that a restraining order was appropriate.