Electrical engineer Michael Freeman died from the industrial disease mesothelioma in 2005. It can only be caused by exposure to asbestos.

Lawyers acting for Mr Freeman's widow, Evelyn, need to speak to his former colleagues in Lancashire to find out more about his working life to support her claim for compensation.

Evelyn (56), from Surrey said: "My husband was a very hard-working man and had a job which took him to lots of different companies up and down the country, but now we need to find out how he was exposed to the asbestos which ultimately killed him.

"I hope witnesses can come forward who may have known or worked with my husband to help bring some closure to this matter for me and my family."

Mr Freeman also leaves a son, two daughters and four grandchildren.

It is believed Mr Freeman worked at Ribblesdale Cement Works, Clitheroe, between 1982 and 1983. He worked for a company called F.L. Smith, which was involved in a major extension of the plant, and was responsible for electrical testing and training.

Jeremy Brooke, of Simpsons Sissons and Brooke, the law firm representing the family, said: "We are desperate to hear from anyone who knew Mr Freeman, worked with him or worked at any of the companies at the times that he did. Any information at all could help bring relief to Evelyn and her family."

Anyone who knew Mr Freeman, the companies he worked for or the work they did, should contact Jeremy Brooke on 0114 2413973.