Nearly a quarter of five-to-seven-year-olds now have their own smartphone according to OFCOM. Social media use also rose in the same age group over the last year with nearly two in five using the messaging service WhatsApp, despite its minimum age of 13. The communications regulator in its annual study of children's relationship with technology warned parental enforcement of rules 'appeared to be diminishing'. It also said the figures should be a 'wake up call' for the industry to do more to protect children. Anita Rani is joined by Daisy Greenwell, co-founder of a campaigning organisation Smartphone Free Childhood. Earlier this week Reverend Grace Thomas posted a photo on social media of a male passenger having chosen to sit next to her on a practically empty bus. The attached message read, 'Please don't do this… it immediately puts me on edge. I can't be alone in this, surely.' It turns out she wasn’t; her post has attracted more than 10 million views, 150,000 likes and hundreds of comments that include women with similar experiences. Reverend Grace joins Anita along with Michael Conroy, founder of Men At Work, who trains professionals that work with boys and young men. On average, we spend one-third of our waking life alone. Anita talks to psychologist Netta Weinstein, Professor of Psychology at the University of Reading, who has co-written a new book called Solitude: The Science and Power of Being Alone. Whether you love it or try to avoid it, she explains the benefits of being alone and gives us some tips on how to be better at it. The final episode of the 18th series of The Apprentice aired last night. After a battle that saw boutique gyms go head-to-head with a pie delivery service, Lord Alan Sugar decided to invest two hundred and fifty thousand pounds into a luxury gym business run by Rachel Woolford. Anita speaks to the entrepreneur about her victory. This weekend it’s the 100 year anniversary of the death of Marie Corelli, the promoter of Shakespeare’s house and a bestselling novelist in her own right; she outsold HG Wells and Arthur Conan Doyle, publishing 25 books which were devoured in their millions by English readers, Americans and those in the colonies. Anouska Lester, an academic talks to Anita about Marie Corelli. Presenter: Anita Rani Producer: Rebecca Myatt Studio manager: Donald MacDonald