Gary Carter, 32, died when he was crushed between his lorry and a machine as he was working at the site in Cranford last year.

An inquest jury returned a verdict on his death saying they believed there was inadequate supervision, training and procedures, which contributed to his death.

Mr Carter, of Carway, near Swansea, died on January 4 when another lorry shunted his wagon forward crushing him into a waste machine.

Before sending the jury out Assistant Deputy Coroner, Tom Osborne told them it was not for them to determine negligence and directed them to either give a verdict of accidental death or a narrative verdict.

A spokesman for Sita said: "Following the inquest we would like to reiterate our condolences to the family and friends of Gary Carter. We have co-operated with the coroner and the Health and Safety Executive throughout their involvement in this matter and will now be considering the verdict."

Speaking afterwards on behalf of the Carter family, solicitor Rebecca Hearsey said: "This was a particularly horrific workplace fatality, which tragically led to a young life being needlessly cut short.

"We maintain that this incident was totally avoidable if correct working procedures had been followed that day.

"In light of the evidence which has been disclosed during the course of this inquest, the family is exceptionally disappointed that the jury was not allowed to consider all appropriate verdicts, including the option of unlawful killing.

"Throughout this case all the family have wanted is a full and independent investigation into this tragedy. Gary's family thought the best way to achieve this would be to have allowed the 11 jurors to consider all possible verdicts."