Olivia Spencer is 31 and lives in London with her husband Robbie, a primary school teacher, and their two children: Polly is 4 and will start school in September, Zach is nearly 3. Her third child is due in November. Olivia's book 'Sad Dad: An Exploration of Postnatal Depression in Fathers' is out in Septmber, and available to pre-order now.