A DRAMA series based on an infamous mass murder should be postponed until a decision is made on a potential judicial review for the convicted killer, according to his representatives.

The first episode of White House Farm - a six-part drama series based on the murders of Sheila Caffell, her twin six-year-old sons, Daniel and Nicholas, and her parents, Nevill and June Bamber in 1985 - is due to be screened on ITV tonight.

Jeremy Bamber was jailed for life for the murders but has consistently denied being responsible.

He claims Sheila, who had a history of mental health problems, killed the family at the farm in Tolleshunt D’Arcy before turning the gun on herself.

Lawyers working on his behalf have made an appeal to the High Court claiming the Crown Prosecution Service has failed to follow directions to disclose material which he claims would clear him.

He claims two gun silencers were taken from the farm, not one.

Bamber contests evidence from the two silencers was also contaminated and presented to the jury at his trial as coming from one silencer which it was alleged made it impossible for Sheila to be the killer.

A spokesman for Bamber, who has been in prison for more 30 years, said they did not endorse the new series.

“We were willing to provide access to brand new forensic reports, our team of scientists, the case material, fresh evidence and Jeremy and his legal team,” he said.

“Our offers were ignored and we believe, therefore, the drama can only be based on factually incorrect and out of date material.

“Our campaign is not only about proving Jeremy’s innocence, but protecting the memory of his much-loved family who will undoubtedly have their characters dissected and denigrated in order to make sensationalised television.

“This will not benefit anyone, least of all Jeremy in his fight for justice, but will simply be a money pot for ITV, reaping in millions of pounds from a family tragedy that is still unresolved.

“We need to make it clear that the Jeremy Bamber Campaign, Jeremy, and his legal team, do not endorse this drama.”

Mark Newby of Quality Solicitors Jordans, said: “We have written to the producers of the drama series and invited them to postpone the broadcast of this series whilst matters are resolved in the High Court .

“We have intimated we are concerned such a drama series by its nature will place a fictitious narrative in the public domain which may be counter productive to the administration of justice in due course.”

An ITV spokesman said the series was based on extensive research carried out by the producers.