Widows of four electricians who died from the same rare form of brain disease have spoken of their fears of a new cancer cluster.
Audrey Musson is one of the women searching for answers as to whether the death of her husband Neville could be linked to a former chemical plant at Staveley, near Chesterfield.
Neville died six months ago - less than a year after his friend Martin Collis had passed away.
Now Audrey is working with Martin's widow Jacqueline, as the pair appeal for other bereaved families to get in touch.
All four men worked at Staveley Chemicals near Chesterfield during the 1990s, making products for the pharmaceutical and agricultural industries.
While there's no evidence of a direct link between the mens' deaths and the work they carried out, John Knight, from the Trade Union Safety Team in Chesterfield, has been asked to investigate.
Local MP Toby Perkins is also now looking into the case.
The site is now owned by Rhodia Limited - whose parent company is the Belgian chemical giant Solvay. Rhodia's involvement in the site began in the late 1980s.
Rhodia have now offered to speak to representatives of the families to discuss their concerns.
Click below to watch David Hirst's report: