He calls himself a body modification artist, but Brendan McCarthy AKA ‘Dr. Evil’ has just been sentenced to 40 months in prison for grievous bodily harm. He was jailed over tongue splitting, and nipple and ear removal procedures despite having the consent of his clients. We speak to one of his customers Wayne Fitzpatrick and BBC Stories’ Ruth Evans, who had been following the case for two years, about the limits of consent when it comes to our bodies.

Producers: Lucy Hancock and Georgia Coan