Bright Kids, Big City

Can young children navigate their way across London on their own?

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How much independence should a child under seven have? And is giving them freedom a vital part of their development?

These questions are explored by doctors Chris and Xand van Tulleken in their new three-part series Planet Child on ITV.

Inspired by the freedom given to children in other countries, the pair test a group of British kids, aged seven and under, to see if they can cross London using public transport without their parents.