A DENTAL student who was jailed for life for the murder of her lover's pregnant teenage wife in Bury has launched a second bid to overturn her conviction.

Harmohinder Sanghera, who was found guilty of the killing in 2007, has applied to the Criminal Cases Review Commission (CCRC) to have the case re-examined. Five years ago, she failed to persuade judges that her trial was unfair.

Yesterday, a spokesman for the CCRC, said: "Ms Sanghera applied to the Criminal Cases Review Commission. Her case is currently under investigation.”

An independent public body created by an Act of Parliament in 1997, the CCRC investigates alleged miscarriages of justice.

They look at cases where an appeal has been made, either by an individual or by solicitors acting for them.

Sanghera, aged 30, was jailed for life at Manchester Crown Court for the murder of Sana Ali.

The 17-year-old, who was 11 weeks pregnant, suffered 46 knife wounds, mainly in her abdomen, at her home in Throstle Grove, Brandlesholme, on May 11, 2007.

She suffered a collapsed lung and bled to death by the time she was discovered and taken to hospital by members of her family two hours later.

Sanghera, a Birmingham University dental student, had been having a two-year-long relationship with Sana's Muslim husband, Sair Ali.

She was arrested for the killing after it was found she visited the house on the day the teenager died.

It was argued by the Crown at the trial that she had killed her young rival out of "jealousy and desperation" after learning of her pregnancy and that Sair Ali's family would never bless a relationship between him and Sanghera because of the religious divide between them.

Despite protesting that Sana was fine when she had left her home, Sanghera was convicted of murder.

In 2009, Sanghera, who lived in Solihull, appealed against the "safety" of that conviction at London's Criminal Appeal Court.

Michael Birnbaum QC, for Sanghera, argued that, while cell site evidence of mobile phone calls had been put before the jury as evidence that her visit to Sana's home was within the "window of opportunity" during which the killing was carried out, they had not been shown the whole picture.

He told the court that the fact that a text on her phone had been opened after Sanghera was said to have killed her rival had not been put before the jury and that omission could have seriously effected the credibility of Sanghera's defence.

Mr Birnbaum also argued, amongst other things, that the judge at the trial had misdirected the jury in important respects.

Lord Justice Dyson dismissed the criticism of the judge's directions to the jury saying: "In our judgement there was no misdirection. Alternatively, if there was, it was of no significance.

"The judge gave an impeccable general direction on the evidence. In our judgement there is nothing in this ground of appeal."