Split - the movie and do real people have Multiple Personalities?

Split is a creepy new film released in cinemas. It stars James McAvoy in a psychological thriller as a deranged man with 23 personalities who kidnaps 3 girls. But can people have multiple personalities? Can they really split, as McAvoy does in the film? What is Disassociative Identity Disorder (DID)? Is there any help? The good news is that you don't have to go to see the movie to find the answers to these questions, nor is it all terrifying. One of the nations foremost authorities on DID lives in Newbury, West Berkshire, - Carolyn Bramhall. Her book, Am I Good Girl Yet? Plus her many speaking engagements and seminars help folk understand, come to terms with and find help.