Jack, 11, was born with a cyst on his brain which caused uncontrollable seizures and weakened the left side of his body.
He underwent a hemispherectomy at Great Ormond Street Hospital (GOSH) to disconnect the left side of his brain from the right – a surgical procedure that helps to control seizures in about 80 per cent of patients.
GOSH developed the UK's first service for children with severe epileptic seizures, which has grown into one of the largest paediatric epilepsy surgery programmes in the world.
