We look at the two sides to being a good parent, Love and Limits.

• Professor of Child Health and Behaviour, King's College London
• Consultant Children’s Doctor, and head of a team helping parents support children with behavioural and emotional issues. Based at the Maudsley Hospital – the leading centre in Europe.
• Director, National Academy for Parenting Research, and author of a bestselling textbook on children’s mental health and wellbeing.
• Awarded CBE by the Queen for services to families .

"I have always liked working with children, so it was natural for me to become a paediatrician. But despite being an "expert" who worked at Great Ormond Street, when I became a real-life father I couldn't stop my 3 day old son screaming his head off. I had to call the midwife, who soon sorted him out. Over time I became more and more interested in understanding how the ways that parents behave affects their children.

I was fortunate to be appointed head of the parenting clinic at the Maudsley Hospital, where for the last 25 years I and my team have worked with families. We’ve researched the most effective way to enable them help their children become happier and better adjusted, as well as learning faster and having improved brain growth. Every family and every child is different, but there are some universal truths about good parenting. My clinic is limited in how many families we can see, so I am delighted to bring the fruits of my research and personal experience to a far wider audience by going online."

• GP with a special interest in parenting
• Founder, Parenting Matters – running parenting courses individually, in groups or by Skype and seminars in schools and businesses.
• Author of the bestselling Blood Sugar Diet, Clever Guts & Fast 800 Recipe Books. Married to Dr Michael Mosley
• Mail on Sunday health columnist.

“Before I had children I assumed that bringing them up would come naturally. But it doesn’t. Finally, with 3 children under 5 and working as a busy GP, I realised that I was out of my depth! I was lucky that my mum was very supportive, and she encouraged me to go on a University course about parenting. What I learnt made such a big difference that I wanted to share it with other parents.

So I set up a successful face-to-face programme called Parenting Matters, which ran for many years, but I realised that an online course would be far more accessible for parents. So I teamed up with Prof Stephen Scott to create Parenting Matters. Here we share the secrets of effective parenting, based on the latest evidence and years of experience working with families.”

• BBC Science Broadcaster (Trust Me I’m a Doctor, Horizons)
• Columnist for various newspapers
• Bestselling author of The 5:2 Fast Diet, The Blood Sugar Diet and The Fast 800
• Expert on helping people change their behaviour and habits

“I met Clare at medical school, and we later got married. Unlike her, I didn’t stay in medicine but instead I became a BBC journalist and then a television presenter. Like Clare, I thought that having kids would be a breeze. It wasn’t. We did the best we could, but it was sometimes a struggle.

When Clare set up Parenting Matters, I was so impressed to see how parents appreciated it and what a difference it made that I decided to make a TV series called Little Angels with Prof Tanya Byron, a leading psychologist who helped families with challenging children turn their lives around by working on more effective parenting skills. I think an online course is a brilliant idea and I do hope you enjoy it! Simple changes can transform your life, as in my book, "Just One Thing!"