A Cornish man is to discuss possible links between his wife's death and the Camelford water poisoning incident.
A toxic chemical was tipped into the wrong tank at the Lowermoor works
Doug Cross will meet other members of the Department of Health sub group set up to investigate the 1988 incident.
His wife Carole, 59, had been suffering from a brain disease similar to Alzheimer's. Her brain was found to have high levels of aluminium.
The poisoning happened when 20 tonnes of aluminium sulphate was poured into the wrong tank at a treatment works.
Thousands of consumers in north Cornwall were affected.
Mr Cross, who insisted that a post mortem examination be carried out on his wife, has been invited to address the sub-group on Monday.
It is due to publish its final report in the New Year.