Manon

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.

"Offenders can be described as their own community - and as part of that they have their own language or code that they use to hide in plain sight," said Manon.