"I often felt really misunderstood and struggled to handle my emotions - I was very angry," actress Nkechi Simms tells a group of young people at a north London Pupil Referral Unit (PRU).
She is part of a mentorship scheme aimed at supporting young people in PRUs across the capital.
It has received a boost of £2.3m from the London mayor's Violence Reduction Unit (VRU) to expand the number of mentors to cover all 32 boroughs.
PRUs are alternative education providers aimed at children who have been excluded from school or are otherwise unable to attend a mainstream setting.