Relatives of four men, sentenced to 126 years imprisonment for the acid attack murder of Bradford dad Barry Selby, protested outside the city's crown court yesterday, as part of a campaign to overturn the convictions.

Supporters of the convicted killers claim the guilty verdicts were wrong because evidence in the trial was inadequate or misleading.

Lawyers representing Lee Calvert, Joseph Lowther, Robert Woodhead and Andrew Feather confirmed they had lodged appeals against their convictions.

They were found guilty of murder by a jury at Bradford Crown Court in June after a six-week trial.

Calvert, 23, Lowther, 22, and Feather, 23, all of Holme Wood, and Woodhead, 28, of Tyersal, were jailed for life.

Trial judge Mr Justice Globe ordered Calvert to serve a minimum of 36 years behind bars; Lowther and Woodhead have to serve at least 32 years and getaway driver Feather was given a minimum 26 years imprisonment.

The court heard how father-of-three Mr Selby died four days after suffering 50 per cent burns when sulphuric acid was poured over him in the bedroom of his home in Rayleigh Street, East Bowling. He was also shot in the leg.

None of the defendants chose to give evidence in the trial.

Yesterday, around 20 family and friends gathered outside the crown court building, with banners and a petition, and handed out leaflets.

Calvert's sister, Kelly Calvert, said: "We are fighting for justice. We will not rest until we get justice and the convictions overturned."

The families have launched a Facebook campaign, have carried out protest marches in London, Bradford and Wigan, and say they have 4,000 signatures of support.

Miss Calvert added: "I am 100 per cent confident we will succeed. I am not going to give up.

"I feel sorry for the other side. But we are fighting for justice and to find the real killers. I hope someone will come forward as a result of what we are doing."

The families have contacted JENGbA, a miscarriage of justice campaign group.

Janet Cunliffe, of JENGbA, said: "We are offering support."

She added: "There is always a victim, and we are mindful of that."

Mr Selby's family has previously said the defendants had had the chance to protest their innocence in court.