Copyrighted image Credit: BBC Professor Robert Winston, series presenter Thirteen years ago the BBC set out on an ambitious project: to follow the lives of twenty-five children after their birth at the Millennium.

In these special two programmes presented by Professor Robert Winston we discover how our families have changed and how our children are preparing to leave their childhood behind and enter their teenage years.

You'll discover how the children are preparing for the greatest change in their lives—and how their parents will need to let them go—to grow as adults.

As we pass the halfway point in this ambitious 20-year TV experiment the two programmes consider the most important unit of all: the family.

Drawing on an unprecedented collection of extraordinary observational footage, we’ll reveal the remarkable and compelling stories of Britain’s most documented families as they look back on their lives over the last decade—and embark on a new chapter—as the children enter their teenage years.

From working mothers, to single parent dads and the rise of the blended family, you’ll explore dramatic changes towards family life and explore the wider shifts every family can relate to.

Child of Our Time begins on Wednesday 27 February at 9pm on BBC One, with the second episode at the same time the following night. Read more about the episodes below or visit the BBC's Child of Our Time pages.