is one of the changes to face painting night, also in the squad kicking off in about an hour, kieran trippiergomez, more for you on that bbc news throughout the evening. that's all from sportsday. we'll have more throughout the evening. bye for now. one of the biggest challenges of brain surgery is working out how much of a tumour can be removed from a patient without damaging their speech, movement or other brain functions. now, scientists at the university of cambridge are developing a ground—breaking device that will map a patient‘s brain and act like a sat nav for surgeons, showing them what each part of the brain does. our science correspondent, richard westcott, has this report on the new technology —— and a warning: it includes pictures of the surgery taking place. a few months ago, totally out the blue, ben rush had a seizure in bed. i'm going to dim the lights for this one now. they found a large tumour — clearly visible on this scan. incredibly, it may have been growing for a decade without him knowing and he's only 29. a few months later, surgeon thomas santarius is removing it. wh