CAMPAIGNERS fighting for the release of convicted killer Jeremy Bamber are taking their fight to the top.

Bamber's support group has written to Secretary of State for Justice Elizabeth Truss requesting an urgent meeting.

The group is also calling for certain information to be disclosed and say they should have access to more evidence relating to Bamber's second failed appeal.

They said the Court of Appeal instructed the Metropolitan Police collate evidence stipulated in the orders which are known as the Stokenchurch Investigation.

Stokenchurch collated the documents and stored them electronically and Bamber's team say the total amount of material came to 88 boxes.

However, they say they only received partial disclosure totalling only 68 boxes of material.

A spokesman for Bamber said: "We know these 20 boxes exist owing to documents which make reference to the box numbers and from the arbitrary disclosure of partial documents relating to the missing boxes.

"Material which was not given to the defence pre-trial in 1986 and was withheld from the 2002 appeal should now be disclosed."

Bamber is serving a whole life tariff at the high security Wakefield prison in Yorkshire.

Next month, he will have served 30 years in prison after being found guilty by a majority verdict at Chelmsford Crown Court of the murders of his parents Nevill and June, his sister Sheila Caffell and her twin sons Nicholas and Daniel at White House Farm in Tolleshunt D'Arcy.

Bamber has always denied the crimes saying it was Sheila, who had mental health problems, who carried out the four murders before turning the gun on herself.