A joint investigation between Thames Valley Police and the Health and Safety Executive is ongoing into the deaths of Michael Collings, Ken Cresswell, Christopher Huxtable and John Shaw,who were all employed by Coleman & Company.

The quartet were killed under falling rubble when the power station’s boiler house collapsed on February 23 2016.

Thames Valley Police Deputy Chief Constable, Jason Hogg said: “Our thoughts and deepest sympathies are today with the families of Michael Collings, Ken Cresswell, Christopher Huxtable and John Shaw, who lost their lives.

“We continue to investigate this incident looking at offences of Corporate Manslaughter, Gross Negligence Manslaughter and Health and Safety at Work Act offences.

“The investigation remains hugely complex with vast amounts of evidence and witness statements.

“However, the dedicated investigation team, led by a nationally accredited homicide detective, will continue with unwavering determination to find the answers that the families deserve.

“I know that the families are still waiting for the answers about what happened to their loved ones. We continue to support the families and provide them with regular updates on the investigation.

“Again, I extend my condolences to the families and offer with this a guarantee that we will continue to do everything in our power to complete our joint investigation as soon as possible.”

Demolition trade body the NFDC reached out to investigators this week to offer assistance.

CEO Howard Button said: “Our main concern at this time is closure for the families of the four men we tragically lost from the industry, and for learnings to be published so we can avoid any more incidents like this happening in the future – for the safety of everyone in demolition.”