The grieving mother of a man trapped in the wreckage of the collapsed boiler house at Didcot Power Station has spoken of her pain over the length of time it is taking to recover his body.

Christopher Huxtable, 33, and two colleagues Ken Cresswell, 57, and John Shaw, 61, were buried on February 23 while working to prepare the structure for demolition.

As the six month anniversary of the disaster approaches, Mr Huxtable's mother Sandra has repeated calls to speed up work to recover the men's bodies. And she said, last night, that her family had even written to the former Prime Minister David Cameron pleading for him to intercede and get action.

Mrs Huxtable, from Swansea, blamed Health and Safety regulations for delays to recovery work. The remainder of the boiler house was blown up on July 17, meaning the search operation could go ahead.

She said the family – including Mr Huxtable's brother Jonathan and sister Natallie had faced an agonising wait.

She said: “They still haven’t found him. I am not doing too well at the moment.

“They have gone in but they haven’t found his body. They haven’t found any of the bodies yet.

“It’s a very difficult time for my family. They really need to crack on now and get them out of there.

“They have been going in there every day.

“All our family are just so upset."

She said the family pleaded to Witney MP Mr Cameron for him to step in and supply more resources for the recovery mission, but said they did not receive a response.

When asked if she planned to also write to new Prime Minister Theresa May, Mrs Huxtable said: “Everyone knows they are in there and nobody is bothering to help.”

The recovery operation has seen contractors from RWE, which owns the plant, working for up to 12 hours a day, seven days a week, to clear up sections of the collapsed rubble and steel. However, no bodies have been recovered.

A spokesman for the firm said it was determined to return the men's bodies to their families, adding: “The recovery operations are ongoing and our contractors continue working seven days a week 12 hours a day to help return the men as soon as possible.

“We understand how difficult the delay in recovering the men must be for their families and are fully committed to do everything we can to return John Shaw, Ken Creswell and Chris Huxtable to them as soon as possible.”

A spokesman for Thames Valley Police said the force was working to support the grieving families and would inform them as soon as the bodies are located.

The spokesman added: “The search for the missing people is ongoing.

“When someone is located we will let the families know first and then put out a public announcement."