Where appropriate, the assent of the child will be sought (usually under age 11 or younger), and in the case of young adults who would be deemed able by a member of the clinical team to consent on their own part (usually age 12 or older), consent from the young person will be accompanied by the parent/carer giving signed assent before they can join the study; to ensure both child and parent/carer are willing and happy to take part. For children unable to give written consent/assent, the parent/carer will be asked to explain the study in terms that the child can understand and the carer will sign consent on their behalf.