51�Թ�

"I never saw tears running down his cheeks," said another victim named Manon Lemoine.

When Manon Chiswell was a toddler she suddenly stopped talking - doctors advised her family she was showing lots of autistic traits.

But a blood test later found high levels of lead in Manon's blood.

Her father, Huw Chiswell, believed Manon was most likely poisoned at their home in Cardiff, which was near an old industrial site.

Despite applying to work there, Manon - again, not her real name - was not sure if it was a job she could do.